Question

the electronic configuration of oxygen is written as 1s² 2s² 2px² 2py¹ 2pz¹ and not as 1s² 2s² 2px² 2py² 2pzo explain????​

Answer 1

Answer:

this is explained according to Hund's rule of maximum multiplicity which says that the orbitals of equal energy are filled with single electron first and pairing is done after that

as 2px 2py and 2pz are of equal energy so single single eletron in each orbital should be filled first and then after the pairing is done