Question

What are the rules to be followed while writing a chemical formula of a compound?​

Answer 1

Answer:

The rules that you have to follow while writing a chemical formula are as follows:

In compounds formed with polyatomic ions, the number of ions present in the compound is indicated by enclosing the formula of ion in a bracket and writing the number of ions outside the bracket.

Explanation:

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Answer 2

Explanation:

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. While writing the formula of a compound containing a metal and a non-metal, the symbol of the metal is written first followed by that of the non-metal. Two metals do not join up to form compounds.
• Write the valency of each element / ion.
• Interchange the valencies of the elements / ions and write as the subscript. Write them close together and ignore ‘1’ to obtain the formula.
• The radical / polyatomic ions must be written in brackets, before the subscript is written. In case the number of polyatomic ion is one, the bracket is not required. For example – NaOH.
• Whenever applicable, write simple ratios of the valencies.
• The final formula must be written without any sign of the charge.