砷化镓(GaAs)是一种“LED'’绿色节能光源材料。根据镓元素的相关信

砷化镓(GaAs)是一种“LED'’绿色节能光源材料。根据镓元素的相关信息图得到有关镓元素的说法错误的是

    A.原子的核电荷数是31    B.元素符号是Ga

    C.属于金属元素    D.相对原子质量为69.72g

  

答案

 D

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