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 hydrocarbons are compounds composed of carbon and hydrogen atoms, with one or more carbon-carbon double or triple bond in their chemical structure. Unsaturated hydrocarbons are commonly used in many industrial processes for the production of pesticides, fuel, paints, lacquers and more.elow are examples of the unsaturated hydrocarbons. On the left is the chemical structure of acetylene, which contains a triple bond, and on the right is the chemical structure of styrene, which contains several double bonds.