配套习题- 化学式的意义 -【青果学苑】

1/5单选题

难度：

1.下列符号中既能表示一种元素，又能表示一种元素的一个原子，还能代表一种单质的是

A	H
B	N₂
C	Fe
D	O

正确答案：Qw==

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

2/5单选题

难度：

2.有关过氧化氢（化学式为H₂O₂）的说法，正确的是

A	过氧化氢是由氢元素和氧元素组成
B	过氧化氢是由氢气和氧气组成
C	过氧化氢是由氢分子和氧分子构成
D	过氧化氢是由两个氢原子和两个氧原子构成

正确答案：QQ==

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

3/5单选题

难度：

3.下列符号既能表示一种元素，又能表示该元素的一个原子，还能表示一种单质的是

A	N₂
B	H
C	O
D	Fe

正确答案：RA==

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

4/5单选题

难度：

4.下列符号既能表示一种元素又能表示一个原子，还能表示一种单质的是

A	O₂
B	Mg
C	H
D	N

正确答案：Qg==

QeOAgeivpeespuWPt+aYr+awp+awlOeahOWMluWtpuW8j++8jOS4jeaYr+WFg+e0oOespuWPt++8jOaVhemAiemhueS4jeespuWQiOmimOaEj++8jjxicj5C44CBTWflsZ7kuo7ph5HlsZ7lhYPntKDvvIzlj6/ooajnpLrplYHlhYPntKDvvIzooajnpLrkuIDkuKrplYHljp/lrZDvvIzov5jog73ooajnpLrplYHov5nkuIDljZXotKjvvIzmlYXpgInpobnnrKblkIjpopjmhI/vvI48YnI+Q+OAgUjlsZ7kuo7lj6/ooajnpLrmsKLlhYPntKDvvIzooajnpLrkuIDkuKrmsKLljp/lrZDvvIzkvYbkuI3og73ooajnpLrkuIDnp43ljZXotKjvvIzmlYXpgInpobnkuI3nrKblkIjpopjmhI/vvI48YnI+ROOAgU7lsZ7kuo7lj6/ooajnpLrmsK7lhYPntKDvvIzooajnpLrkuIDkuKrmsK7ljp/lrZDvvIzkvYbkuI3og73ooajnpLrkuIDnp43ljZXotKjvvIzmlYXpgInpobnkuI3nrKblkIjpopjmhI/vvI48YnI+5pWF6YCJ77yaQu+8jg==

5/5单选题

难度：

5.2014年央视3.15晚会发布信息：市场上一些橡皮、涂改液经检测机构检验后发现甲苯（C₇H₈）超标34倍．甲苯不但会刺激眼睛、呼吸道，如果在密闭空间里大量吸入，还会造成急性中毒，甚至会致癌．下列有关甲苯的说法错误的是

A	从性质上看：甲苯是一种有毒的物质
B	从变化上看：甲苯完全燃烧只生成水
C	从宏观上看：甲苯由碳、氢二种元素组成
D	从微观上看：1个甲苯分子由7个碳原子和8个氢原子构成

正确答案：Qg==

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