Assertion (A): Atoms with completely filled a | vedclass

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(A) The extra stability of half-filled and fully filled electronic configurations can be explained in terms of symmetry and exchange energy.All the or

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$(A)$ and $(R)$ are correct, $(R)$ is the correct explanation of $(A)$

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(A) The extra stability of half-filled and fully filled electronic configurations can be explained in terms of symmetry and exchange energy.All the orbitals of the same subshell that are either completely filled or half-filled have a more symmetrical distribution of electrons.Consequently, the shielding of electrons is relatively small, and the electrons are more strongly attracted by the nucleus.Furthermore, the number of possible exchanges is maximum in these configurations, which leads to higher exchange energy and, therefore, greater stability of the atom.Thus, both $(A)$ and $(R)$ are correct, and $(R)$ is the correct explanation of $(A)$.

Assertion $(A)$: Atoms with completely filled and half-filled subshells are stable.
Reason $(R)$: Completely filled and half-filled subshells have symmetrical distribution of electrons and have maximum exchange energy.
The correct answer is:

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Assertion $(A)$: Atoms with completely filled and half-filled subshells are stable.Reason $(R)$: Completely filled and half-filled subshells have symmetrical distribution of electrons and have maximum exchange energy.The correct answer is: