The outer orbitals of C in ethene molecule can be considered to be hybridized to give three equivalent $s{p}^2$ orbitals. The total number of sigma $\left(\sigma \right)$ and $\left(\pi \right)$ bonds in ethene molecule is

In the ethene molecule (C₂H₄), the total number of sigma (σ) and pi (π) bonds is 5 sigma bonds and 1 pi bond.

• Structure: Each carbon is sp² hybridized, forming three sigma bonds (2 with H, 1 with C).
• The double bond between the carbons consists of one sigma and one pi bond.

Total:

• Sigma bonds: 4 C-H + 1 C-C = 5
• Pi bonds: 1 C-C = 1

So, ethene molecule has 5 sigma and 1 pi bond.