AP BIOLOGY

Detailed explanation-1: -Alkenes are acyclic (branched or unbranched) hydrocarbons having one carbon-to-carbon double bond (C=C) and the general molecular formula CnH2n [16]. Because alkenes contain less than the maximum possible number of hydrogen atoms per carbon atom, they are said to be unsaturated.

Detailed explanation-2: -Therefore alkenes are called unsaturated hydrocarbons owing to the presence of carbon-carbon double bond in alkene molecules, giving them characteristic addition reactions.

Detailed explanation-3: -An alkene is a hydrocarbon with one or more carbon-carbon double covalent bonds. The simplest alkene is composed of two carbon atoms and is called ethene (shown below). Each carbon is bonded to two hydrogen atoms, in addition to the double bond between them.

Detailed explanation-4: -Alkenes are similar to Alkanes except they contain a double bond between two carbon atoms instead of a single bond. When one carbon shares a double bond with another, this limits the number of hydrogen which can be bonded (resulting in less hydrogen atoms per carbon atom).

Detailed explanation-5: -Alkenes are unsaturated hydrocarbons with one or more carbon-carbon double bonds. This C=C double bond is the functional group that defines a molecule as an alkene. Alkenes have the general formula: CnH2n.