Percent Abundance & Percent Composition

Percent Abundance

Most every element comes in a few different isotopes, which have different numbers of neutrons and therefore different masses. But the periodic table only tells you the average mass. What's a chemistry student to do?!

Percent Composition of Compounds

In this short video we'll cover the only type of question that teachers seem to ask, which is how to find the mass percentage that each element in a compound is responsible for.