Which element from following has largest atomic size as compared to other three?

Which element from following has largest atomic size as compared to other three?
  1. S
  2. Se
  3. Cl
  4. Br

Solution

The atomic size increases down the group, as a result of increase in the number of quantum shells and decreases along the period from left to right. Therefore, the increasing order of atomic size is $\mathrm{Cl} \lt \mathrm{S} \lt \mathrm{Br} \lt \mathrm{Se}$.

Asked in: MHT CET 2024 (11 May Shift 2)

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