moleculer orbital can hav maximum of
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two electrons
Electrons fill molecular orbitals following the same rules that apply to filling atomic orbitals; Hund's rule and the Aufbau principle tell us that lower-energy orbitals will fill first, electrons will spread out before they pair up, and each orbital can hold a maximum of two electrons with opposite spins.
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two electrons
THE COVALENT BOND REEXAMINED
Electrons first occupy the molecular orbitals of lowest energy; they enter higher-energy molecular orbitals only when the lower-energy orbitals are filled. Each molecular orbital can accommodate a maximum of two electrons (Pauli exclusion principle).
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