This PowerPoint document introduces students to counting by weighing, atomic masses provided on the Periodic Table showing masses in atomic mass units & grams, the topic of moles, molar mass and how to calculate percent composition. This PowerPoint would be most appropriate for use within a high school chemistry class, within the Moles Unit. This document will work optimally with the other Notes within the Moles Unit & the Moles Unit - Guided Practice Questions, Review documents, Labs & As