You are watching: Why are anions larger than their parent atoms
The size of an anion is bigger than its parent atom because anions are formed due to the acquire of electrons. When the electrons rise, there are still the exact same number of prolots. The attractive pressure is hence decreased as there are the very same variety of prolots attracting an increased variety of electrons. This reasons the electrons to not be bound as tightly to the nucleus causing a boost in size.In other words, anions have actually one or even more added electrons that contribute to the dimension of the atom. These added electrons increase its size and also make it bigger than the neutral atom
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The formation of anion takes area as soon as an atom gains electrons. Example....Br + 2e- ———› Br(2-)(2-) is it"s valency.Now, as soon as it gains electrons, there"s no change in the complace of it"s nucleus (that is, the number of nucleons or much better to say protons). So, the Nuclear charge remains the exact same as a result of which the nuclear pull on the valence shell will certainly also remajor the very same. But the valence shell gains electrons and stabilizes itself because of which the nuclear pressure deserve to no much longer pull it via the exact same force. This outcomes in the increase in atomic radii of the ion (more particularly, anion). Therefore, Anion is larger in dimension than the parent atom. The oppowebsite happens in the instance of cation. Thanks. Hope this helps you..!!