Identify the element having smallest atomic radius from following

Identify the element having smallest atomic radius from following
  1. $\mathrm{Ar}$
  2. P
  3. Si
  4. $\mathrm{Cl}$

Solution

In a period as we right wards size of an atom $\downarrow$, but Ar has smallest size.

Asked in: MHT CET 2022 (06 Aug Shift 1)

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