The order of increasing sizes of atomic radii | vedclass

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(C) In a group,atomic radii increase down the group due to the addition of new shells. Thus,the order for group $16$ elements is $O < S < Se$.$As$ (Ar

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$O < S < Se < As$

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(C) In a group,atomic radii increase down the group due to the addition of new shells. Thus,the order for group $16$ elements is $O $As$ (Arsenic) belongs to group $15$ and is located to the left of the group $16$ elements in the periodic table. Across a period from left to right,atomic radii decrease due to an increase in effective nuclear charge. Therefore,$As$ has a larger atomic radius than the elements of group $16$ in the same period.Comparing the sizes,$O < S < Se$ and $Se < As$. Thus,the overall order of increasing atomic radii is $O < S < Se < As$.

The order of increasing sizes of atomic radii among the elements $O$,$S$,$Se$ and $As$ is

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