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Gaokao Chemistry Practice Question

2. (6 分) 下列叙述正确的是 ( )

  1. A.$24 \mathrm{~g}$ 镁与 $27 \mathrm{~g}$ 铝中, 含有相同的质子数
  2. B.同等质量的氧气和臭氧中, 电子数相同
  3. C.$1 \mathrm{~mol}$ 重水与 $1 \mathrm{~mol}$ 水中, 中子数比为 $2: 1$
  4. D.$1 \mathrm{~mol}$ 乙烷和 $1 \mathrm{~mol}$ 乙烯中, 化学键数相同

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