Question

Why elect negative element do not former cation

Answer 1

Electronegative element do not form action as they are short of only 3,2,1 electrons to attain octet i.e. in order to become stable ,so they gain electron(s) to become stable and forms anion.
Eg - Chlorine (Cl)
Z= 17
Configuration - 2,8,7
It gains electron to form Cl- ion