Question

KO2 is paramagnetic but Li2O is diamagnetic-Why?​

Answer 1

Answer:

as the electron in the penultimate and anti penultimate shells are equal and effective nuclear charge increases, KO2 is paramagmetic and Li2O is diamagnetic in nature from the MOT(molecular orbital theory).

Answer 2

KO2 is paramagnetic but Li2O is diamagnetic because from the MOT, KO2 is paramagnetic and Li2O is diamagnetic as the effective nuclear charge grows and the electron in the penultimate and anti penultimate shells are equal .

• A superoxide with an odd number of electrons is called KO2 (unpaired electron). KO2 is hence paramagnetic in nature.
• If any of a compound's electrons are unpaired, it becomes paramagnetic, and if all of its electrons are paired, it becomes diamagnetic.
• When exposed to a magnetic field, diamagnetic materials are partially repulsed and lose their magnetic properties when the external field is removed. When exposed to a magnetic field, paramagnetic materials are only weakly drawn to it once the external field is removed, the materials lose their magnetic qualities.

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