Origin: a Latin derivative
meaning "Gift of the Earth."
An important skill in chemistry is the ability to draw and recognize the structures of different molecules. Generally, molecules are drawn using the symbols of the atoms (remember the symbol can be found on the Periodic Table) that are connected with straight lines. These lines represent the covalent chemical bonds that are formed between the atoms making up a molecule. One line indicates a single bond, two lines indicate a double bond, and three lines indicate a triple bond. Below is a chart showing the name and chemical structure for some simple molecules. In the chemical structures below, note the atoms themselves and the bonds between them.