氧元素是一种重要的元素很多化合物中都含有该元素1如图是氧原子的结构示意图和元素信息单元格回答�氧原子的相对原子质量是1600 Template




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tomski氧元素是一种重要的元素很多化合物中都含有该元素1如图是氧原子的结构示意图和元素信息单元格回答�氧原子的相对原子质量是1600 coloring