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一、选择 1.下列各组物质都是纯净化合物的是 (A)重水、王水、石灰水 (B)甘油、汽油、煤焦油 (C)冰、干冰、冰醋酸 (D)氨气、溴蒸气、氯气 2._1~1H、_1~2H、_1H、H~+都属于 (A)同一种氢原子 (B)化学性质不同的氢原子 (C)氢元素 (D)氢的四种同位素 3.决定原子种类的微粒是 (A)质子 (B)电子 (C)质子和中子 (D)质子和电子 4.下列物质的晶体属于原子晶体的是
I. Selection 1. The following groups of substances are pure compounds are (A) heavy water, aqua regia, lime water (B) glycerol, gasoline, coal tar (C) ice, dry ice, glacial acetic acid (D) ammonia, bromine Vapors and chlorines 2._1~1H, _1~2H, _1H, H~+ belong to (A) the same hydrogen atom (B) hydrogen atoms with different chemical properties (C) hydrogen isotopes (D) hydrogen isotopes 4 The particles that determine the atomic species are (A) protons (B) electrons (C) protons and neutrons (D) protons and electrons 4. Crystals of the following substances are atomic crystals