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Related to atomic mass unit: relative atomic mass, atomic weight
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Mass number of an isotope is equal to the numerical value of its mass, measured in atomic mass units (a.
Your favorite snacks just wouldn't taste the same without this element, which has an atomic mass of nearly 23 atomic mass units (u).
Residual Gas Analyzer (RGA): A class of quadrupole mass spectrometers that typically cover mass ranges from 1 to 100 or 200 atomic mass units (amu).