The subscripts indicate the number of atoms of the element immediately before it.
A chemical formula includes the symbols of the element in the compound and subscripts that indicates the number of atom of each element.
A chemical formula is the representation of each type of atom in a molecule.
The chemical formula gives information about the elements involves in the molecules represented by the symbol of elements. The symbol of each element are standard and are in the periodic table.
For example : Na = sodium
The number present in the subscripts of the periodic table gives information about the number of atoms of the elements present in the molecule.
For example: [tex]\rm Na_2[/tex] = it has 2 atoms of sodium present.
[tex]\rm CaCl_2[/tex] = it has 1 atom of calcium and 2 atoms of chlorine.
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