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Question 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

Answer

Boron is a p block element & is present in 13th group & 2nd period, carbon is a p block element & is present in 14th group & 2nd period, silicon is a p block element present in 14th group &3rd period, nitrogen is p block element & belongs to 15th group &2nd period while fluorine is also a p block element present in 17th group & 2nd period.The non-metallic character of elements increases from left to right across a period. Thus, the decreasing order of non-metallic character is F > N > C > B.Again, the non-metallic character of elements decreases down a group. Thus, the decreasing order of non-metallic characters of C and Si are C > Si. However, Si is less non-metallic than B i.e., B > Si.

Hence, the correct order of their non-metallic characters is F > N > C > B > Si.

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