Question

Why is fluorine so reactive?

Answer 1

Fluorine has atomic number 9 therefore it's electronic configuration is

2 , 7

Fluorine atom has just 2 shells that means a lesser atomic number which makes this atom capable enough to combine or form covalent bond so as to complete it's octet. Hence this atom has a strong affinity.

In Short, due to

•lesser atomic radius

•Only one electron left to complete octet

•And Stronger strength of nucleus to pull electrons,

Therefore Fluorine is a highly reactive element.