Question

Mention any two important rules for writing a chemical formula.

Answer 1

Answer:

Two rules for writing a chemical formula is:-

• When a compound consists of a metal and a non-metal, the symbol of the metal is written first and on the left whereas of non-metal on its right

• The valencies or on the ions must be balanced in a chemical formula.  

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Answer 2

Answer:

the two rules are:

•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.

Explanation:

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