Question

question which of the following are true of alkenes? (select all that apply) select all that apply: they contain at least one sp² hybrid orbital. some of their carbon atoms are linked by one σ and two π bonds. they are unsaturated hydrocarbons. the bond angles in some of their carbon chains are 120°.

Explanation:

Step1: Define alkenes

Alkenes have a carbon - carbon double bond.

Step2: Analyze $sp^{2}$ hybridization

Carbon atoms in double - bonds are $sp^{2}$ hybridized, so they have at least one $sp^{2}$ hybrid orbital.

Step3: Analyze bond type

Alkenes have a carbon - carbon double bond which is one $\sigma$ and one $\pi$ bond, not one $\sigma$ and two $\pi$ bonds (that's for triple - bonds).

Step4: Analyze saturation

Alkenes have double bonds, so they are unsaturated hydrocarbons.

Step5: Analyze bond angles

$sp^{2}$ hybridized carbon atoms have bond angles of $120^{\circ}$ around them.

Answer:

They contain at least one $sp^{2}$ hybrid orbital., They are unsaturated hydrocarbons., The bond angles in some of their carbon chains are $120^{\circ}$.