What are the rules you have to follow while writing a chemical formula

1.	What are the rules you have to follow while writing a chemical formula?
Answer» 1. The valencies or charges on the ion must balance. 2. When a compound consists of metal and non-metal, the name of the symbol of metal is written first, eg : Calcium oxide (CaO) 3. In compounds formed with poly atomic ions, the ion is enclosed in a bracket before writing the number to indicate the ratio.

What are the rules you have to follow while writing a chemical formula?

Answer»

1. The valencies or charges on the ion must balance.

2. When a compound consists of metal and non-metal, the name of the symbol of metal is written first, eg : Calcium oxide (CaO)

3. In compounds formed with poly atomic ions, the ion is enclosed in a bracket before writing the number to indicate the ratio.