No. Of valence electron are only 1,2,13,14,15,16,17,18 group. so what about other groups?

No. Of valence electron are only 1,2,13,14,15,16,17,18 group. so what

1.	No. Of valence electron are only 1,2,13,14,15,16,17,18 group. so what about other groups?
Answer» 3-12 are transition elements.