Also Known As: Atomic Weight
Examples: The atomic mass of carbon is 12.011; the atomic mass of hydrogen is 1.0079
Atomic Mass Definition - Atomic Weight Definition
Chemistry Glossary Definition of Atomic Mass - Atomic Weight
By Anne Marie Helmenstine, Ph.D., About.com Guide
Definition: Atomic mass or atomic weight is the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element.
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