九年级化学全册 第四单元 我们周围的空气 4.2 物质组成的表示（

Learn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization4.2 物质组成的表示（第二课时)

学习目标：

1.记住常见元素及原子团的化合价，能根据化合价写出常见物质的化学式。 2.学会读化学式，并能根据化学式对物质进行简单分类。 3.能根据化学式推求某元素的化合价。 知识点（重点、难点）：

重点：记忆常见元素及原子团的化合价。 难点：根据化合价写出常见物质的化学式。 实验准备：多媒体素材 板书设计：

4.2 物质组成的表示（第二课时）

二、化合价 1.化合价的确定 2.化合价的特点 3.化合价的规则 4.根和根离子 5.化合价的记忆 6.化学式的书写 7.化学式的读法

8.根据化学式求某元素的化合价

学习过程： 师生互动 【复习回顾】 1. 什么叫化学式？ 2. 化学式：O2、NaCl、H2O分别表示什么意义？ 学生思考、抢答。 【创设情境】 【投影】 名称 水 氨 甲烷 活动意图 从实际问题入手，复习旧知，自然引入。 化学式 H2O NH3 CH4 名称 氯化钠 氯化镁 氯化铝 化学式 NaCl MgCl2 AlCl3 名称 氧化钠 氧化镁 氧化铝 化学式 Na2O MgO Al2O3 【问题】不同元素的原子相互化合时，原子个数比相同吗？ 是什么决定了原子相互化合的数量关系？ 学生观察、思考、回答。 【导入新课】 一种元素一定数目的原子和其他元素一定数目的原子相化 合的性质是元素的化合价。它决定了原子相互化合的数量关系。 【板书】 4.2 物质组成的表示（第二课时） 二、 化合价 【出示学习目标和重难点】 earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \n\ce of carrier, makes general grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres as a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cess, some cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and Learn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\d \hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\do\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization学习目标： 1.记住常见元素及原子团的化合价，能根据化合价写出常见物质的化学式。 2.学会读化学式，并能根据化学式对物质进行简单分类。 3.能根据化学式推求某元素的化合价。 知识点（重点、难点）： 重点：记忆常见元素及原子团的化合价。 难点：根据化合价写出常见物质的化学式。 【过渡】课本第83页展示了部分常见元素的化合价，那么，元素的化合价又是又什么决定的呢？ 【探究一】1.化合价的确定 引导学生阅读课本第82、83页内容，结合老师的举例总结出在化合物中元素化合价是怎样确定的。 ①在离子化合物中，元素的化合价数值就是这种元素的一个原子得到或失去电子的数目，得到电子的显负价，失去电子的显正价。 ②在分子化合物中，元素的化合价数值就是这种元素的一个原子形成共用电子对的数目，质子数多的显负价，质子数少的显正价。 ③有些元素的原子在不同条件下得失电子或形成共用电子对的数目是不同，在化合物中表现出多种化合价。 化学上常用溶质质量分数来表示溶液的组成。那么，什么是溶质质量分数呢？ 【探究二】2.化合价的特点 【投影】常见元素在化合物中的的主要化合价 让学生明确学习方向。 培养学生的自学能力。通过交流，加深对化合价的认识。 元素元素化合元素元素化合元素元素化合 名称 符号 价 名称 符号 价 名称 符号 价 氢 H +1 镁 Mg +2 钙 Ca +2 +2 +2 碳 C 铝 Al +3 铁 Fe +4 +3 -3 -2 +4 氮 N 硫 S 铜 Cu +2 +5 +6 氧 O -2 氯 Cl -1 锌 Zn +2 钠 Na +1 钾 K +1 银 Ag +1 引导学生总结化合价的特点。 【问题】从表中可以看出元素的化合价有何特点？ 学生观察、思考、回答。 ①元素的化合价有正价和负价之分，金属元素只具有正价， 非金属元素既有正价又有负价。 ②许多元素的化合价是可变的。 【探究三】3.化合价的规则 【问题】根据元素的化合价，计算MgO、H2O、MgCl2中各元 素正负化合价的代数和。看看有什么规律？ earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\is the Foundation, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \ into a monotone for doing. Should exploration \n\ce of carrier, makes general grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres as a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and2

Learn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization学生计算、思考、总结。 化合价规则：在化合物中，各元素的正负化合价的代数和为零。 强调：元素的化合价用于定量描述不同元素的原子之间形成化合物时相互化合的比例。因此，人们规定单质中元素的化合价为零。 【投影】 引导学生通过计算总结化合价的规则。 化合价 +1 +2 +3 -2 -1 NaCl MgCl2 AlCl3 MgO NaCl +2+3+2--离子符号 Na Mg Al O Cl 【问题】元素的化合价和离子的表示方法有何异同？ 学生观察、思考、回答。 不同点：1.标注的位置不同；2.正负号与数值的顺序相反； 3.数值为“1”时，化合价不能省略。 相同点：符号和数值相同。 【探究四】4.根和根离子 指导学生阅读课本第82页左下角内容，并回答问题。 培养学生的团结互助精神，增强①什么叫根？什么样的化合物有可能有根？ 学习化学的趣味性。 ②什么根价？如何计算根价？ ③什么叫离子？什么叫根离子？ ④完成下表： 根符根名称 根根离子符根离子名称 号 价 号 SO4 培养学生的阅读能力、归纳能力。CO3 培养学生由 个别到一般、由部分到NO3 OH NH4 全体的认识。 培养记忆能力、语言表达能力并活跃课堂气氛。 3

学生阅读、思考，结合老师的举例完成问题。 【过渡】为了便于记忆，常把常见元素及根的化合价编成口诀。 【投影】 5.化合价的记忆 ①常见元素化学价口诀表（红色为负价） 一价氯氢钾钠银 二价氧钡钙镁锌 三铝四硅五氮磷 二三铁、二四碳 二四六硫都齐全 铜汞二价最常见 ②常见根价口诀表 负一氢氧、硝酸根 负二碳酸、硫酸根 正一价的是铵根 学生大声读、小组内相互提问，并整理在笔记本上。 earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize the value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \n\ce of carrier, makes general grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres as a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members andLearn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\d \hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\do\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization【过渡】同学们知道了元素和根的化合价，如何来书写它们 组成的化合物的化学式呢？ 【探究五】6.化学式的书写 激发学生的发散思维，提高解决问题的能力。 学式”。总结根据化合价写化学式的方法——最小公倍数法。 【练习】已知磷的化合价为+5，氧的化合价为-2，写出磷 的氧化物的化学式。 一学生上黑板板书，其他学生矫正。 【探究升级】化合物化学式书写的另一种方法——交叉法。 1.明确书写依据：化合物中正负化合价代数和为零。 使学生通过学练结合，掌握化学2.明确书写步骤：正前负后标价数；价数角码来交叉；能化式的书写。 简的就化简；不信你就去检验。（口诀） 3.强调根的右下角数字的书写：数字为1，根不加括号；数 字不为1,根加括号。 【追踪练习】 1.已知硫元素的化合价有+4、+6，氧元素的化合价为-2， 分别写出硫元素的氧化物的化学式。 +1 +2 +3 +1 -1 -1 -2 2.写出Na、Mg、Al、NH4分别与OH、NO3、SO4组成化合物的 化学式。 一学生板书，其他学生矫正。 【过渡】写出了化合物的化学式，那么怎么读呢？ 【探究六】7.化学式的读法 思考：由两种元素组成的化合物，如NaCl、CO2、P2O5等， 分别读作：氯化钠、二氧化碳、五氧化二磷。 巩固提高。 ⑴这些物质的化学式在读法和写法上有什么规律？ ⑵请推测NO2、Fe2O3、CaCl2的名称。 老师讲解读法：某化某、某酸某、氢氧化某、几某化几某 等，并强调先读的后写。 指导学生阅读课本第84页的 [活动天地]“根据化合价写化【拓展归纳】单质化学式的读写方法 使学生了解化学式的读法。 4

【追踪练习】 1.写出下列物质的化学式,并进行简单分类。 ①氧气 ②水 ③二氧化碳 ④过氧化氢

earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\is the Foundation, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \ into a monotone for doing. Should exploration \n\ce of carrier, makes general grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres as a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members andLearn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization⑤铁 ⑥氦气 ⑦五氧化二磷 ⑧氢气 单质: ； 化合物: 。 2.已知下列化学式,求其中红色元素符号的化合价。提示：硝酸根（NO3）的化合价是“-1”。 KMnO4 K2MnO4 Na2CO3 Ca(NO3)2 CuSO4 O2 Ca(ClO)2 NH4NO3 学生练习，巩固物质的简单分类、总结根据化学式求某元素的化合价的方法。 完善知识掌握，拓展知识体系。 及时巩固。 【课中检测】 1.H2S气体中硫元素的化合价为（ ） A．+1 B. -1 C. +2 D.-2 2.下列化学式正确的是（ ） A.氧化镁MgO2 B.硫酸铜Cuso4 C.一氧化碳Co D.二氧化碳CO2 3.下列含氯元素的物质中按氯元素化合价由高到低顺序排列的是（ ） ①KClO3 ②HClO ③ Cl2 ④NaClO4 ⑤ＫCl A. ①②③④⑤ B. ④①②③⑤ C. ④①③②⑤ D. ①④②③⑤ 4.已知过氧化钡中氧为-1价则过氧化钡的化学式为（ ） A. Ba2O B. BaO2 C. Ba2O2 D.BaO3 5.两个氢原子表示为（ ） +A. H B. H2 .C.2H D.2H 6．钛铁矿主要成分的化学式为FeTiOx，其中铁元素和钛元素的化合价均显+3价。则x为（ ） A．2 B．3 C．4 D．6 7．下列符号中，既能表示一个原子，又能表示一种元素，还能表示一种物质的是（ ） A．H B．O2 C．He D．Fe 8.用元素符号或化学式填空 （1）4个二氧化碳分子 （2）7个铁原子 （3）1个氧分子 （4）5个硫原子 （5）氧离子 （6）正2价的钙元素 （6）氯化氢中氯元素为-1价 9.请将下列短文中带点的部分，用恰当的化学用语填写在横线上： 太阳镜具有保护眼睛的功能。它的镜脚一般是由塑料(其中含有碳元素 )制成的，玻璃镜片．．．的主要成分是二氧化硅 ，且变色玻璃中含有银离子 ，铜制镜框使用时间过长会生成．．．．．．．铜绿[Cu2(OH)2CO3]，铜绿中氢氧根的化合价显—1价 。 ．．．．．．．．．．．．．．【总结】 通过本节的学习，请同学们谈谈有什么收获？ earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize the value. \arning\on, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a sense of depth. \ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \o a monotone for doing. Should exploration \n\ce of carrier, makes general

grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establish and perfect the effective mechanism of the education, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres as a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, only party members and5

Learn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\d \hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\do\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization【布置作业】 1. 上交作业：助学P66课后评价； 2. 课外作业：记忆元素及根的化合价。 教学反思： 1．本节的内容侧重记忆，如元素的化合价和根的化合价。但重点在于利用化合价书写化合物的化学式。本节课学练结合，环环紧扣，力求实现知识的连贯。上课气氛较好，学生都能积极参与，效果较好。

2．由于涉及到的知识点比较多，常见元素的化合价及根的化合价的口诀归纳和记忆无法当堂完成。 3．建议课堂实施教学过程中，要有所侧重点的进行活动的开展，提高课堂效率，学生理解了的、会了的就少讲或不讲，往往学生的悟比老师的讲更有用。

earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\is the Foundation, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a se

grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establas a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \ into a monotone for doing. Should exploration \n\ce of carrier, makes general on, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres 6

nse of depth. \ish and perfect the effective mechanism of the educationly party members and

Learn General Secretary on \o learn a\hening \s\speech caused a strong reaction in the country. ime, watching \n of building the party back to power, how to strengthen services for the masses, improve party cohesion, fighting to become the grass-roots party members and masses hot topic. Grass-roots party organizations \nd cadres, the pioneer spirit. Distribution of grass-roots party organizations in all walks of people, clothing, shelter, which belongs to the nerve endings of the party organization and comments reputation has a direct perception of the masses. Strengthen the party ahead of the \dal\hen the party members and cadres \does not have to be me\d \hardships, the last to\spirit to set the party's positive image among the people is important. Grass-roots party organizations \nse all people not happy not to see \s\honest faithful, diligent faith for the people. No need to avoid mentioning that, some members of our party can not stand the \Xu Zhou, such abuse and corrupt bribery, malfeasance borers, and rats. Two, is to clean up, thin, Xu, Zhou's solution to restore the party's fresh and natural, solid and honest work style. Cleansing \sirable and behaviour, \d and cold, push\oots party organizations \hen the sense of ordinary party members, participating in consciousness, unity consciousness. For reasons known, members of grass-roots party branches less mobile, less resources, and the construction of party organizations have some lag. Two studies, is to focus on the grass-roots party branches \nd cadres, \orking\Strong cleanup actions, style and rambling, presumptuous \s, pays special attention to party members and cadres \ng party of thought\oblem. \ding\d in the long-term development of our party's historical experience accumulated. Two is our party under the new historical conditions, strengthen the party's construction of a new \oots party organizations should always catch the hard work, results-oriented. Two educational outcomes are long-term oriented and become an important impetus for the work. \d have three kinds of consciousness %udy and education, basic learning lies in the doing. Only the Constitution address the series of party rules, and do solid work, be qualified party members had a solid ideological basis. Only the \ning\do\ \n-do-do\cle, and ultimately achieve the fundamental objective of education. This requires that the Organization【布置作业】 1. 上交作业：助学P66课后评价； 2. 课外作业：记忆元素及根的化合价。 教学反思： 1．本节的内容侧重记忆，如元素的化合价和根的化合价。但重点在于利用化合价书写化合物的化学式。本节课学练结合，环环紧扣，力求实现知识的连贯。上课气氛较好，学生都能积极参与，效果较好。

2．由于涉及到的知识点比较多，常见元素的化合价及根的化合价的口诀归纳和记忆无法当堂完成。 3．建议课堂实施教学过程中，要有所侧重点的进行活动的开展，提高课堂效率，学生理解了的、会了的就少讲或不讲，往往学生的悟比老师的讲更有用。

earning education, need three kinds of consciousness: one is to establish an integrated awareness. \ning\car isTwo-wheel, bird wings, need to go hand in hand, one end can be neglected. Communist theoretician and man. Only by closely combining theory and practice together in order to truly realize their value. \arning\is the Foundation, the Foundation is not strong, shaking; \net thousands of accounts. \s, going to \so that the \ng\ck to standard, so that the majority of party members \ng theory of nutrients, in the \ce party's purposes. Second, to establish a se

grass-roots members can in \has \ements sense, in \n the has \ory brain into heart, put for people service concept outside of Yu shaped. Third, to adhere to long-term the awareness. Style construction on the road forever, \two\catch the long-term. \no means, assault-style wind-sport, but the recurrent education within the party. In recent years, the party's mass line education practice and \-three\al education in grass-roots borne rich fruits, vast numbers of party members and cadres withstood the baptism of the spirit. \d to focus on longer hold long-term, to establas a \barometer and impetus. The \nough deep, is to determine the party cadres can resolve to study hard first. In the \cadres of himself, standing long, high awareness, that Constitution Party rules is simple, its not worth bothering some party cadres think speak series has nothing to do with the grass-roots work, water business learning series of speeches seen as window dressing. These \casual, and decadent\ning lacks motivation, a serious impediment to \once said, only a basic element of human thought patterns change dramatically, human destiny can make great improvement. The same, ning\organic unity of the whole. \ning education, we need to explore integrating \ning\\nce\d the \ng\ple room instruction, \ into a monotone for doing. Should exploration \n\ce of carrier, makes general on, focusing on the creation of long-term education, strive to make the vast number of party members to maintain their vanguard Color, maintain the party's advanced nature and purity. Awareness-raising, antennas and atmosphere a discussion on how leading cadres of party members \ctivity is in full swing up and down the country, party cadres 6

nse of depth. \ish and perfect the effective mechanism of the educationly party members and

本文来源：https://www.bwwdw.com/article/ayi3.html