Question

Which of the following has the smallest size?

(a) Na (b) Na+ (c) Na- (d) Cl+​

Answer 1

Answer:

c) Na-

Explanation:

I think it's a correct answer

Answer 2

(d) Cl+ is the correct answer.

• Atomic size decreases across the period. Thus chlorine will be smaller in size in comparison to sodium.
• Since cation is always smaller than its parent atom, therefore, Cl+ ion will be smallest among the given options.
• Anions are always larger in size in comparison to their parent atoms.
• Cations are defined as atoms or molecules with electrons less than original number while anions are defined as atoms or molecules with electrons more than original number.