Covalent Compounds 2
Another example: Carbon dioxide has a chemical formula of CO2. How is this possible? This is illustrated as follows:
In this case, the double line of one side indicates two bonds are required to connect between the carbon atom and an oxygen atom. Notice that the total number of allowable
bonds for both carbon and oxygen is still maintained.
A single line is usually referred to as a single bond. A two-line symbol as a double bond and a three-line symbol as a triple bond.