Question

a lewis diagram for the molecule c₂h₄ is shown above. in the actual c₂h₄ molecule, the h - c - h bond angles are closest to
a 90°
b 109.5°
c 120°
d 180°

Explanation:

In the \(C_2H_4\) (ethylene) molecule, each carbon atom is \(sp^2\) hybridized. The \(sp^2\) hybridization leads to a trigonal - planar geometry around each carbon atom. In a trigonal - planar geometry, the bond angles are \(120^{\circ}\). Although there are some minor deviations due to electron - electron repulsions (such as between bonding and non - bonding electron pairs, but in \(C_2H_4\) there are no lone pairs on carbon atoms in the simple Lewis structure), the ideal bond angle for \(sp^2\) hybridization (which is the basis for the molecular geometry of \(C_2H_4\)) is \(120^{\circ}\).

Answer:

C. \(120^{\circ}\)