Work the nomenclature for typical alkane molecules. Discuss alkane properties, including boiling point, melting point, color, state, smell. Discuss how they react with oxygen to form carbon dioxide and water. Show how they also react with halogens in the presence of UV light. Introduce cycloalkanes, particularly cyclopropane and cyclobutane. Define strained hydrocarbons with bent angles and weak bonds. Introduce alkenes, the general formula and types of isotopes.