Question

Subshell electronic configuration of two elements are given below
(Symbols are not real)
A->1S2 2S2 2P6 3S2
B->1S2 2S2 2P6 3S2 3P4
what it the valancy of A.?
in which block elment p belongs?​

Answer 1

Answer:

valency of A is two and element B belongs to p block