Jawabanmu

2014-09-04T20:20:38+07:00
A.1s2.2s2.2p5
b.1s2.2s2.2p6.3s2.3p1
c.1s2.2s2.2p6.3s2.3p6.4s2
d.(kr),5s2,4d10,5p5
e.(xe),6s2