Question

How many unpaired electrons are present in the ground state of the atoms in group 6a(16)?

Answer 1

Lets take one element from Group 6A, Let it be oxygen, The electronic configuration of Oxygen is as follow,

                           O  =  8  = 1s², 2s², 2px², 2py¹, 2px¹

There are 6 electrons in the valence shell of elements present in Group 6A. The unpaired electrons in 2px and 2py are involved in forming covalent bond, while the pair of electrons in 2s and 2px are unshared and act as lone pair of electrons.

Result:
          There are TWO unpaired electrons present in the ground state of Group 6A elements.