钾 K [Ar]4S1 钙 Ca [Ar]4S2 钪 Sc [Ar]3d14S2 钛 Ti [Ar]3d24S2 钒 V [Ar]3d34S2 铬 Cr [Ar]3d54S1 锰 Mn [Ar]3d54S2 铁 Fe [Ar]3d64S2 钴 Co [Ar]3d74S2 镍 Ni [Ar]3d84S2 铜 Cu [Ar]3d104S1 锌 Zn [Ar]3d104S2 镓 Ga [Ar]3d104S24p1 锗 Ge [Ar]3d104S24p2 砷 As [Ar]3d104S24p3 硒 Xe [Ar]3d104S24p4 溴 Br [Ar]3d104S24p5 氪 Kr [Ar]3d104S24p6 大部分情况下最外层的就是价电子,但像铜等副族元素例外
