The correct order of atomic radii of C,Al,and | vedclass

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(D) The atomic radius decreases across a period from left to right due to an increase in effective nuclear charge,and it increases down a group due to

Vedclass · Accepted Answer

$C < S < Al$

Vedclass · Answer

(D) The atomic radius decreases across a period from left to right due to an increase in effective nuclear charge,and it increases down a group due to the addition of new shells.$C$ (Carbon) is in period $2$,group $14$.$S$ (Sulfur) is in period $3$,group $16$.$Al$ (Aluminum) is in period $3$,group $13$.Comparing $C$ and $S$: $C$ is in period $2$ and $S$ is in period $3$,so $C Comparing $S$ and $Al$: Both are in period $3$. $Al$ is in group $13$ and $S$ is in group $16$. Since atomic radius decreases across a period,$S  S$.Thus,the order is $C < S < Al$.

The correct order of atomic radii of $C$,$Al$,and $S$ is

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