Question

Find the number of electron in phosphorus!
atom having n+1 = 4​

Answer 1

Explanation:

eloctronic configuration of Phosphorus is 1s2 2s2 2p6 3s2 3p3

n+1=4 then n=3

no of electrons in n=3 is 2+3=5

Answer 2

Answer:

atomic no. of phosphorous is 15

electronic configuration is

K ! L ! M ! N !

2 ! 8 ! 5 ! - !

hence it's valency will be -3

to find electron...

given :- n+1

-3 + 1

= -2