Alkene

Alkene: a group of organic compounds that are unsaturated hydrocarbons.
The general formula of alkene: \(C_nH_{2n}\)
Homologous series: a group of organic compounds represented by a general formula, have the same functional group and every member is different from the others by a common structural unit, \(-CH_2\).
Functional group: atom or group of atoms that determines the chemical properties of members of a homologous series.

Properties	Explanation
Melting point
Increases as going down the group	As going down the group, the molecular size increases Requires more energy to overcome the attractive forces
Boiling point
Increases as going down the group	As going down the group, the molecular size increases Requires more energy to overcome the attractive forces
Density
Increases as going down the group	As going down the group, the molecular size increases
Solubility in water
Insoluble in water	Alkenes are covalent compounds
Conductivity of electricity
Does not conduct electricity	Does not contain freely moving ions