Q. The high reactivity of fluorine is due to?

A
Small size of fluorine atom
B
its high electro negativity
C
availability of d-orbitals
D
strong F - F bond
Solution:

Fluorine is the most electronegative element because it has 5 electrons in it’s 2P shell. The optimal electron configuration of the 2P orbital contains 6 electrons, so since Fluorine is so close to ideal electron configuration, the electrons are held very tightly to the nucleus.

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