Please note that this microsite is no longer actively supported. Some of the links/email addresses may no longer work. To see our latest secondary science products visit the main Nelson Thornes website.
Formulas
The formula for a chemical shows which
atoms it is mde of. Each chemical in a reaction can be
shown by its formula.
Formulas are useful in several ways:
They provide a shorthand way to write a substance.
They help us compare the relative masses
of different molecules.