Question

How many $\sigma$ bonds are present in $C_2$?

Answer 1

The electronic configuration of $C_2$ is $1s^2\ast 1s^{2}2s^2\ast 2s^{2}2p{x}^{2}2p{y}^2$. $C_2$exists only in vapour phase. Bond Order = $\frac{6-2}{2}$ = 2. It consists of 1 sigma bond and 1 pi bond.