Q

Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is :

3.39   Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is :

(a) B > C > Si > N > F

(b) Si > C > B > N > F

(c) F > N > C > B > Si

(d) F > N > C > Si > B

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Answer -  (c) F > N > C > B > Si

Because non-metallic character of an elements increases from left to right across the period. And here given position of elements:

Boron (B)  -  $2^{nd}$ period and $13^{th}$ group.

Carbon (C)  -  $2^{nd}$ period and $14^{th}$ group.

Nitrogen (N)  -  $2^{nd}$ period and $15^{th}$ group.

Fluorine (F)  -  $2^{nd}$ period and $17^{th}$ group.

And the Silicon (Si) is present in the $3^{rd}$ period and  $14^{th}$ group.

Hence the correct order of non-metallic character is as follows:

F > N > C > B > Si

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