Match the given molecules with the number of electron pairs shared between their atoms.

Oxygen $\left(O_2\right)$, nitrogen $\left(N_2\right)$ and hydrogen $\left(H_2\right)$ molecules are formed through covalent bonding between their atoms.

• One electron pair is shared between two hydrogen atoms to form a $H_2$ molecule.

• Two electron pairs are shared between two oxygen atoms to form an $O_2$ molecule.

• Three electron pairs are shared between two nitrogen atoms to form a $N_2$ molecule.