A nutral atom of an electron has `2K,8L` and `5M` electron .Find out the following
Number of unpaired electrons

Options

A. 2
B. 3
C. 4
D. 5

Answer

B

Explanation

The electronic configuration of an atom with `2K,8L` and `5M` electron is :
`1s^(2)2s^(2)2p_(x)^(2)2p_(y)^(2)2p_(z)^(2)3s^(2)3p_(x)^(1)3p_(y)^(1)3p_(z)^(1)`
Number of unpaired electron` = 3(3p_(x)^(1)3p_(y)^(1)3p_(z)^(1))`