下列关于nana 的说法中正确的是a它们属于不同种元素b它们的核外电子数不同c它们的相对原子质量都不同d它们的化学性质完全相同 Template




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tomski下列关于nana 的说法中正确的是a它们属于不同种元素b它们的核外电子数不同c它们的相对原子质量都不同d它们的化学性质完全相同 coloring