Answer to Question #208358 in Physical Chemistry for Rajat sahoo

Question

Why molecular oribital theory changes in oxygen case

Answer 1

Moving to the right over a period, the s orbitals are more stable than the p orbitals, and their energy difference increases, making the s-p mixture of oxygen much smaller. The atomic orbitals of the O atoms overlap to form the σ and Ï€ orbitals of the O₂ molecule.