元素周期表原子系数3,4,12,13,15,18,20,29,47的元素符号和相对原子质量并指出它们是金属、非金属、还是稀有气体元素
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![元素周期表原子系数3,4,12,13,15,18,20,29,47的元素符号和相对原子质量并指出它们是金属、非金属、还是稀有气体元素](/uploads/image/z/3471999-15-9.jpg?t=%E5%85%83%E7%B4%A0%E5%91%A8%E6%9C%9F%E8%A1%A8%E5%8E%9F%E5%AD%90%E7%B3%BB%E6%95%B03%2C4%2C12%2C13%2C15%2C18%2C20%2C29%2C47%E7%9A%84%E5%85%83%E7%B4%A0%E7%AC%A6%E5%8F%B7%E5%92%8C%E7%9B%B8%E5%AF%B9%E5%8E%9F%E5%AD%90%E8%B4%A8%E9%87%8F%E5%B9%B6%E6%8C%87%E5%87%BA%E5%AE%83%E4%BB%AC%E6%98%AF%E9%87%91%E5%B1%9E%E3%80%81%E9%9D%9E%E9%87%91%E5%B1%9E%E3%80%81%E8%BF%98%E6%98%AF%E7%A8%80%E6%9C%89%E6%B0%94%E4%BD%93%E5%85%83%E7%B4%A0)
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