rerlerak pada golongan dan priode berapa unsur unsur berikut 12mg,13Ai,14Si,16S,33As,38Sr,50Sn,54Xe,83Bi,88Ra

Mg 2 8 2 G:IIA P:3
Al 2 8 3 G:IIIA P:3
Si 2 8 4 G:IVA P:3
S 2 8 6 G:VIA P:3
As 2 8 18 5 G:VA P:4
Sr 2 8 18 8 2 G:IIA P:5
Sn 2 8 18 18 4 G:IVA P:5
Xe 2 8 18 18 8 G:VIIIA P:5
Bi 2 8 18 32 18 5 G:VA P:6
Ra 2 8 18 32 18 8 2 G:IIA P:7