Question

write the rules used for making chemical formula.

Answer 1

1. To know the valency of element and charge on them

Answer 2

hii mate
 Writing Chemical Formulas of Covalent Compounds

Memorize the prefixes for number of atoms. ...Write the chemical symbol for the first element. ...Add the number of atoms as a subscript. ...Write the chemical symbol for the second element. ...Add the number of atoms present as a subscript. ...Practice with some examples.