Question

What is a chemical formula? List the rules of writing a chemical formula.​

Answer 1

Explanation:

What is a chemical formula? List the rules of writing a chemical formula.

Answer 2

A molecular chemical formula employs symbols to denote the molecule of anelement or of a compound is called chemical formula .

Rules for writing chemical formulae

(i) We first write symbols of elements which form compound.

(ii) Below the symbol of each element, we should write their valency.

(iii) Now cross over the valencies of combining atoms.

(iv) With first atom, we write the valency of second atom (as a subscript).

(v) With second atom, we write the valency of first atom (subscript).