Question

give reason that the size of anion is greater than size of parent atom​

Answer 1

Size of anion is greater than size of parent atom because when parent atom gains electrons from other atoms to complete their octet they also get one more shell.

Answer 2

Explanation:

because an extra electron is added to the shell i.e 8 by which there is a more repulsion among electrons ,resulting in the decrease the nuclear charge and thus increase the atomic Radius