有abcd四种元素a元素形成的离子中只有一个质子b原子的最外层电子数是次外层的3倍c元素的一价阳离子核外有10个电子d元素的原子 Template




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tomski有abcd四种元素a元素形成的离子中只有一个质子b原子的最外层电子数是次外层的3倍c元素的一价阳离子核外有10个电子d元素的原子 coloring