Lucy was found by Donald Johanson and Tom Gray on November 24, 1974, at the site of Hadar in Ethiopia. They had taken a Land Rover out that day to map in another locality. After a long, hot morning of mapping and surveying for fossils, they decided to head back to the vehicle.
Alkanes are an example of saturated compounds. An unsaturated compound is a chemical compound that contains carbon-carbon double bonds or triple bonds, such as those found in alkenes or alkynes, respectively. Saturated and unsaturated compounds need not consist only of a carbon atom chain.
Unsaturated hydrocarbon: a hydrocarbon that contains one or more carbon-carbon double bonds, triple bonds, or benzene rings. Alkanes: They are saturated hydrocarbons (they have only carbon-carbon single bonds). The molecular formula of this group is C n H 2n+2 (n is the number of carbon atoms). Naming the unbranched alkanes: Chemists have adopted a set of rules established by the International Union of Pure and Applied Chemistry (IUPAC). The IUPAC name for an alkane consists of two parts: 1.