Provide the orbital structure of ethene showing: $(i)$ $\sigma$-bond $(ii)$ $\pi$-bond $(iii)$ The number of $\sigma$ and $\pi$-bonds $(iv)$ The hybridization.

(N/A) $(i)$ The $\sigma$-bond in ethene is formed by the $sp^{2}-sp^{2}$ head-on overlap between two carbon atoms and $sp^{2}-s$ overlap between carbon and hydrogen atoms.
$(ii)$ The $\pi$-bond is formed by the lateral (sideways) overlap of unhybridized $2p$-orbitals of the two carbon atoms.
$(iii)$ Ethene $(C_{2}H_{4})$ contains $5$ $\sigma$-bonds ($4$ $C-H$ and $1$ $C-C$) and $1$ $\pi$-bond.
$(iv)$ Both carbon atoms in ethene are $sp^{2}$ hybridized.