What was Atomic Mass and Mass Nuber. Don't copy from Google Baba.
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Atomic mass is also known as atomic weight. Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. The mass number is a count of the total number of protons and neutrons in an atom's nucleus.
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The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass unit or amu.By definition,an atom of carbon with six neutrons, carbon 12 has an atomic mass of 12 amu
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