Question

Write down the electronic configuration of oxygen using hunds rule

Answer 1

Oxygen (Z = 8) atom, the element after nitrogen in the same period; its electron configuration is: 1s2 2s2 2p4.


Oxygen has one more electron than nitrogen; as the orbitals are all half-filled, the new electron must pair up. Keep in mind that elemental oxygen is found in nature typically as dioxygen, O2O2, which has molecular orbitals instead of atomic orbitals as demonstrated above.


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