21 Chemistry -- Classification of Elements and Periodic Table

Size of the anion is larger than the size of parent atom. Explain.

Size of the anion is larger than the size of parent atom. Explain.


Ans: The size of anion is larger than the size of parent atom because anions are formed due to gain of electrons. When the electrons increases, there are still the same number of protons. This causes the electrons to not be bound tightly to the nucleus like earlier and results in an increase atomic size.

More questions on Classification of Elements and Periodic Table

Which is bigger Li+ or Na+?

SimilarlyLi+would be the smallest because it has only 2 electrons and therefore the least electron- electron repulsion. When comparing F- and Na +, we have to be careful, as both of them have 10 electron,SoNa+is smaller due to thelargerattractive force of the protons.
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