Question

2p outershell is filled first and 3p later Explain the reason​

Answer 1

Explanation:

according to azimuthal quantum numbers

the value of s orbital is l=0

for p= 1

for d=2

and l=3 for f orbital.

according to n+l rule

the value of 2p =2+1=3

and the value of 3p=3+1=4

therefore 2p fills first....