if the symbol for cobalt is written as co what would be wrong with it code example

Example: if the symbol for cobalt is written as co what would be wrong with it

Because in a symbol, only first letter should be capital. So, Co stands for element cobalt but CO stands for carbon monoxide. If we write CO instead of Co for cobalt, then that would be wrong. The symbol for Cobalt cannot be written as CO because CO is the symbol for a poisonous gas called carbon monoxide