Which one of the following indicates correct order of atomic size of the given elements?

Which one of the following indicates correct order of atomic size of the given elements?
  1. Li $>$ B $>$ F $>N$
  2. N $>$ F $>$ Li $>$ B
  3. F $>\mathrm{N}>\mathrm{B}>\mathrm{Li}$
  4. Li $>$ B $>$ N $>$ F

Solution

The atomic size/radius decreases in a period from left to right. Thus, ${ }_3 \mathrm{Li}>{ }_5 \mathrm{~B}>{ }_7 \mathrm{~N}>{ }_9 \mathrm{~F}$

Asked in: AP EAMCET 2023 (17 May Shift 2)

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