Question

What is the chemical formula ? What is the rule for writing a formula correctly ?

Answer 1

A molecular chemical formula employs symbols to denote the molecule of an element or of a compound. The rule for writing chemical formula is Firstly, write the symbols with positive charge valency first.

The rule of writing chemical formula is all u have to know the valency of the elements then interchange with each other for instance water H₂O in water hydrogen and oxygen is present valency of hydrogen is 1 and valency of oxygen is 2 ...the valencies got interchanged and formed H₂O or water.