1/5单选题
难度：
1.“天然益力，焕发生命力．”在“益力”矿泉水瓶上标有一些矿物含量，如图，这里的“钾、镁、钠、钙”指的是
| A | 单质 |
| B | 分子 |
| C | 元素 |
| D | 原子 |
- 提示1：
- 4oCc6ZK+44CB6ZWB44CB6ZKg44CB6ZKZ4oCd5LiN5piv5Lul5Y2V6LSo44CB5YiG5a2Q44CB5Y6f5a2Q562J5b2i5byP5a2Y5Zyo
正确答案：Qw==
4oCc55uK5Yqb4oCd55+/5rOJ5rC055O25LiK6YeM55qE4oCc6ZK+44CB6ZWB44CB6ZKg44CB6ZKZ4oCd5LiN5piv5Lul5Y2V6LSo44CB5YiG5a2Q44CB5Y6f5a2Q562J5b2i5byP5a2Y5Zyo77yM6L+Z6YeM5omA5oyH55qE4oCc6ZK+44CB6ZWB44CB6ZKg44CB6ZKZ4oCd5piv5by66LCD5a2Y5Zyo55qE5YWD57Sg77yM5LiO5YW35L2T5b2i5oCB5peg5YWz77yOPGJyPuaVhemAie+8mkPvvI4=
2/5单选题
难度：
2.下列物质中，既没有氢元素又没有氧元素的是
| A | 水 |
| B | 铁 |
| C | 氨气 |
| D | 碳酸氢铵 |
- 提示1：
- 5rOo5oSP5a6h6aKY44CC6KaB5rGC6YCJ5Ye65Y2z5rKh5pyJSOWFg+e0oOS5n+ayoeaciU/lhYPntKDnmoTnianotKg=
正确答案：Qg==
Qemhue+8jOawtOeUseawouWFg+e0oOWSjOawp+WFg+e0oOaehOaIkO+8jOS4jeWQiOmimOaEj++8mzxicj5C6aG577yM6ZOB55Sx6ZOB5YWD57Sg5p6E5oiQ77yM5pei5LiN5ZCr5rCi5YWD57Sg5Lmf5LiN5ZCr5rCn5YWD57Sg77yM56ym5ZCI6aKY5oSP77ybPGJyPkPpobnvvIzmsKjmsJTnlLHmsK7lhYPntKDlkozmsKLlhYPntKDmnoTmiJDvvIzkuI3lkIjpopjmhI/vvJs8YnI+ROmhue+8jOeis+mFuOawoumTteeUseawruWFg+e0oOOAgeawouWFg+e0oOOAgeeis+WFg+e0oOOAgeawp+WFg+e0oOaehOaIkO+8jOS4jeWQiOmimOaEj+OAgjxicj7nu7zkuIrvvIzpgInmi6lC6aG544CC
3/5单选题
难度：
3.一种元素与另一种元素的本质区别是原子的
| A | 电子数 |
| B | 核电荷数 |
| C | 中子数 |
| D | 相对原子质量 |
- 提示1：
- 5YWD57Sg5piv6LSo5a2Q5pWw77yI5Y2z5qC455S16I235pWw77yJ55u45ZCM55qE5LiA57G75Y6f5a2Q55qE5oC756ew
- 提示2：
- 5Yaz5a6a5YWD57Sg56eN57G755qE5piv6LSo5a2Q5pWw77yI5Y2z5qC455S16I235pWw77yJ
正确答案：Qg==
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
4/5单选题
难度：
4.下列说法不正确的是
| A | 重金属盐在使人中毒的过程中，发生了化学变化 |
| B | 冰雪灾害中使用的融雪剂（盐和缓蚀剂）属于混合物 |
| C | 铁丝在氧气中燃烧时，火星四射，生成黑色固体 |
| D | 用于奥运“祥云”火炬的燃料丙烷（C3H8）中含有3个碳元素 |
- 提示1：
- 5pys6aKY6ICD5p+l5YWD57Sg55qE54m554K55LmL5LiA77ya5YWD57Sg5piv5a6P6KeC5qaC5b+177yM5Y+q6K6y56eN57G75LiN6K6y5Liq5pWw44CC
正确答案：RA==
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
5/5单选题
难度：
5.下列说法正确的是
| A | 具有相同质子数的微粒属于同一种元素 |
| B | 相同元素的原子原子核一定相同 |
| C | 一种元素变成另一种元素，一定变化的是质子 |
| D | 化学变化的过程中元素的种类一定变化 |
- 提示1：
- 5rOo5oSP5YWD57Sg5piv5a6P6KeC55qE5qaC5b+177yM5LiN6IO955yL5YGa5b6u6KeC55qE5b6u57KS44CC
- 提示2：
- 5Yaz5a6a5YWD57Sg56eN57G755qE5piv6LSo5a2Q5pWw77yM5Y205LiO5Lit5a2Q5pWw5peg5YWz
- 提示3：
- 5YyW5a2m5Y+Y5YyW5Lit77yM5YWD57Sg55qE56eN57G75LiA5a6a5LiN5Y+Y44CC
正确答案：Qw==
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