Question

How many unpaired electrons are in an O atom?

Answer 1

2

Explanation:

electronic configuration is

O(8)= `1s^2 2s^2 2p^2`

we can see `s` subshells are full so we check for p.

for 2p we have `p_x,p_y,p_z` and orbitals by Hunds Rule of maximum multiplicity we can have 2 electrons in seperate orbitals.,and hence we have 2 unpaired electrons.