The atomic radii (pm) of Al, Si, N and F resp | vedclass

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Question

(B) The atomic radii of the given elements are approximately: $Al = 143 \ pm$, $Si = 117 \ pm$, $N = 74 \ pm$, and $F = 64 \ pm$. $Al$ and $Si$ belong

Vedclass · Accepted Answer

$143, 117, 74, 64$

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(B) The atomic radii of the given elements are approximately: $Al = 143 \ pm$, $Si = 117 \ pm$, $N = 74 \ pm$, and $F = 64 \ pm$. $Al$ and $Si$ belong to the $3^{rd}$ period, while $N$ and $F$ belong to the $2^{nd}$ period. Within a period, the atomic radius decreases from left  >  right due to an increase in effective nuclear charge. Thus, the order of atomic radii is $Al (143 \ pm) > Si (117 \ pm) > N (74 \ pm) > F (64 \ pm)$.

The atomic radii $(pm)$ of $Al, Si, N$ and $F$ respectively are:

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