初三化学符号全!
氢氦锂铍硼碳氮氧氟氖钠镁铝硅磷硫氯氩钾钙HHeLIBeBCNOFNeNaMgAlSiPSClArKCa钾钙钠镁铝锌铁锡铅(氢)铜汞银铂金KCaNaMgAlZnFeSnPbHCuHgAgPtAt...