CBSE - XI Science - Chemistry - Structure of Atom
Why half filled orbitals are more stable?
When you add more electrons, the spins start to pair up. Basically, the cars coming in now are going the other way round the roundabout and often come close to each other. Electrons are negatively charged and repel each other, so having a state in which the electrons must get close is relatively high in energy. This is the basis of Hund's rule of maximum multiplicity.
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