Shows you how to find the percentage of the mass of an element and gives you the equation that you need to find it. It also shows you some examples of how to do it.
Percentage composition (or percentage
of the mass of something) shows how
much of an atom is in a compound.
1. Add all of the atomic
masses of each element
together. 2. Divide the
atomic mass of the
element by the overall
atomic mass. 3. times it by
100. 4. Put a % sign in front
of it.