元素�期表是学习和研究化学的重要工具.下表是1 3�期元素的部分信息1为某元素的原子结构示意图该元素符号是al.2第三�期元素中 Template




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tomski元素�期表是学习和研究化学的重要工具.下表是1 3�期元素的部分信息1为某元素的原子结构示意图该元素符号是al.2第三�期元素中 coloring