Question

Why in nitrogen and oxygen there is difference in molecular orbital theory?

Answer 1

Because they are different substances with different atomic and molecular structures

Answer 2

Explanation:

S-p mixing is the primary cause of the difference in the molecular orbitals of nitrogen and oxygen, which is influenced by the initial atomic orbital energies. ... The more stabilized 2s orbital does not s-p mix as effectively, due to the greater energy difference between the 2s and 2p orbitals.