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  • Define the term ionic radius. Justify that the radius of anion is larger than the parent atom.

Define the term ionic radius. Justify that the radius of anion is larger than the parent atom.

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When any atom gains or loses electron or electrons and becomes an ion, then the distance from the centre of nucleus to the outermost shell of this ion is known as ionic radius. The radius of anion is always laarger than the parent atom because in anion the number of electrons are more than parent atom and the amount of positive charge in both of them is equal, thus the attraction between the protons and electrons in the anion is lesser than the parent atom. Thus, the size of anion is always larger than the parent atom.

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Ankit Dutt

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