Very Short Question and Answers - Writing Chemical Formulae

It is a symbolic representation of the composition of a compound, showing the elements present and their ratios.

You must ensure that the total positive charge equals the total negative charge by adjusting subscripts.

The formula is NaCl.

The formula is Mg(OH)₂.

Calcium (Ca) has a valency of 2.

The formula is (NH₄)₂SO₄.

There are 7 atoms (1 Ca, 2 N, and 6 O).

The subscript indicates the number of atoms of the element present in the compound.

The valency of Aluminum (Al) is 3.

The formula is H₂S.