Question

what is a chemical formula ? what rules should be folowed while wirting a chemical formula ?​

Answer 1

Answer:

The rule for writing chemical formula are: -Firstly, write the symbols with positive charge valency first. - Secondly, write the valency of each atom on the top of its symbol. - Thirdly, divide the valency number by their highest common factor ignore the positive or negative radicle.

Answer 2

Answer:

Explanation:

A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element

Rules for writing a chemical formula

• Write down the symbols of the elements / ions, which combine to form a molecule of the compound, side by side. ...

• Write the valency of each element / ion.

• Interchange the valencies of the elements / ions and write as the subscript. ...

• The radical / polyatomic ions must be written in brackets, before the subscript is written.