Molecular orbital diagram of O₂O₂ का आण्विक कक्षक आरेख

NCERT Fig 4.21 · interactive diagram

Parts and their functions

• Filling order for O₂, F₂ (O₂, F₂ के लिए भरने का क्रम) — σ1s < σ*1s < σ2s < σ*2s < σ2pz < (π2px = π2py) < (π*2px = π*2py) < σ*2pz. (For B₂, C₂, N₂ the π2p levels lie below σ2pz.)
• Two unpaired electrons in π* (π* में दो अयुग्मित इलेक्ट्रॉन) — By Hund’s rule the last two electrons occupy π*2px and π*2py singly — so O₂ is paramagnetic, which Lewis structures cannot explain.
• Bond order = ½(Nb − Na) (बंध कोटि = ½(Nb − Na)) — O₂: ½(10 − 6) = 2 (double bond). O₂⁺ 2.5, O₂⁻ 1.5, O₂²⁻ 1. Higher bond order → shorter, stronger bond.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 4.21. Report a mistake