The correct order of the atomic radii of C, C | vedclass

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Question

(A) The atomic radius increases down a group and decreases across a period from left to right. Carbon $(C)$ is in Period $2$,Group $14$. Sulfur $(S)$

Vedclass · Accepted Answer

$C < S < Al < Cs$

Vedclass · Answer

(A) The atomic radius increases down a group and decreases across a period from left to right. Carbon $(C)$ is in Period $2$,Group $14$. Sulfur $(S)$ is in Period $3$,Group $16$. Aluminum $(Al)$ is in Period $3$,Group $13$. Cesium $(Cs)$ is in Period $6$,Group $1$. Comparing their positions: $C$ $(Z=6)$ is the smallest as it is in Period $2$. $S$ $(Z=16)$ and $Al$ $(Z=13)$ are in Period $3$. Since atomic radius decreases across a period,$Al > S$. $Cs$ is in Period $6$,which is much larger than the others. Thus,the order is $C < S < Al < Cs$.

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

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