Discribe the theory associated with the radius of an atom as it gains

1.	Discribe the theory associated with the radius of an atom as it gains an electron
Answer» Solution :As a NEUTRAL atom GAINS and ELECTRONS to form anion, its size (radius) incraeses because the anion has the same nuclear CHARGE and more electron compared to the parent atom. Thus anions have less effective nuclear cahrge than the parent atoms and hence they are LARGER in size.

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