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What is the difference between atomic mass and atomic numbers

User Belle Tian
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Atomic mass (amu) = the number of protons and electrons

Atomic numbers = the little number on the periodic table that any element has which represents the number of protons in the nucleus

User Zafer Faheem
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Atomic number is the number of protons that are inside that atom. This helps identify which element an atom is.

Atomic mass is the number of protons and neutrons inside an atom.