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Grade 12th passInorganic Chemistry

The correct decreasing order of electronegativity isis(a) F>O>N> Be (b) Be>F >O>N (c) o >F >N>Be (d) N>Be>O> F why answer can not 2 options explain in detail as possible...

Profile image of Harshit Singh
5 Years agoGrade 12th pass
Answers icon

1 Answer

Profile image of Pawan Prajapati
5 Years ago
Answer :

(a) is correct
reasons:
electronegativity depends on atomic radius of the atom
if the atomic radius is very less the shared pair of electron will get attracted to the nucleus leading to electronegativity
the atomic size decreases along a period and electronegativity increases
also atomic radius increases along a group which leads to decrease in electronegativity
now,
as the atomic radius is
Be>N>O>F
electronegativity would be
F>O>N>Be.

Thanks

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