Question

What actually happen in sharing of $e^{-}$ between two atom to form covalent bond. We see that in H -H the total no. of $e^{-}=2$ but we count $2e^{-}$ for each H- atom. Give a clear concept. What is the actual reason for sharing?

Answer 1

The bond formed by sharing electrons between two atoms is called covalent bond. To get octet electronic configuration and extrastability, the electrons are shared between two atoms. The atoms that are going to form covalent bond is of similar electronegativity. So the ${}^{\prime }{2}^{\prime }$ electrons in the bond are counted for single atoms. For example $H_2\Rightarrow H-H$ . It contains ${}^{\prime }{2}^{\prime }$ electrons. $H_1$ contains $2$ electrons and $H_2$ contains $2$ electrons.