Answer
Element symbols are written using one or two letters. If two letters are used, the first letter will always be uppercase and the second letter will always be lowercase. CO stands for carbon (C) and oxygen (O) in carbon monoxide.
Work Step by Step
Element symbols are written using one or two letters. If two letters are used, the first letter will always be uppercase and the second letter will always be lowercase. CO stands for carbon (C) and oxygen (O) in carbon monoxide.