Question

what is the electronic is configuration of lithium silicon helium sodium and phosphorus

Answer 1

1) Lithium :- valency = 3
electronic configuration= 2,1

2) Silicon :- valency = 14
electronic configuration=2,8,4

3) Helium:- valency = 2
electronic configuration=2

4) Sodium:- valency= 11
electronic configuration= 2,8,1

5) Phosphorus:- valency=15
electronic configuration=2,8,5