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一、原子的构成及化学键[高考题回放]【例1】(2013·海南化学)重水(D2O)是重要的核工业原料,下列说法错误的是()A.氘(D)原子核外有1个电子B.1H与D互称同位素C.H2O与D2O互称同素异形体D.1H218O与D216O的相对分子质量相同解析:氘(D)是氢元素形成的一种核素,含有1个质子和1个中子,核外有1个电子,A项对;1H与D是氢元素形成的两种不同核素,二者具有相同的质子数和不同的中子数,互为同位素,B项对;H2O与D2O是氢元素和氧元素
First, the atomic structure and chemical bonds [Example 1] (Example 1) (2013 · Hainan Chemical) Heavy water (D2O) is an important nuclear industry raw materials, the following statement is wrong () A. deuterium (D) An electron B.1H and D each other isotopes C.H2O and D2O mutual allotropes D.1H218O and D216O the same relative molecular mass Analysis: Deuterium (D) is a hydrogen element formed by a nuclide containing a Proton and a neutron, there is an electron outside the nucleus, A pairs; 1H and D are two different nuclides hydrogen element, both with the same number of protons and different numbers of neutrons, each other isotopes, B pair; H2O and D2O are hydrogen and oxygen