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Curated Video
Molecular mass
The mass of one molecule of a substance. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract concepts and key...
Khan Academy
Khan Academy: Atomic Weight and Atomic Mass
Video tutorial explains the difference between atomic weight and atomic mass in chemistry, and how it compares to the physics definitions of weight and mass. [8:53]
Khan Academy
Khan Academy: Test Prep: Mcat: Physical Processes: Atomic Nucleus: Atomic Mass
Explains how we measure the mass of an atom. [8:33]