18. What is extra stability rule ?
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The orbitals in which the sub-shell is exactly half-filled or completely filled are more stable because of the symmetrical distribution of electrons. ... When the orbitals are half-filled or completely filled then the number of exchanges is maximum. Therefore, its stability is maximum.
The orbitals in which the sub-shell is exactly half-filled or completely filled are more stable because of the symmetrical distribution of electrons. ... When the orbitals are half-filled or completely filled then the number of exchanges is maximum. Therefore, its stability is maximum.Explanation:
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