Question

In coordinate chemistry how to find unpaired electron easily and quickly. .becz I'm preparing for neet gyus. ...anybody know the trick means tell me. ....

Answer 1

Answer:

1 ^s

2^s ,2^p

3^s 3^p , 3 ^d

Now

1s^2 , 2s^2 , 2p^2

so 1 is unpaired and 8 is paired

likewise

1s^2 ,2s ^2 ,2p^6, 3s ^2 ,3p^3

so 3 is unpaired and 12 paired