MASS NUMBER at Chemical Glossary

What is it? is the relative mass of the isoes compared to that of Carbon-12 whose mass is 12.0000 g/mol. It is not shown on the periodic chart. It is also equal to the sum of protons + neutrons inasmuch as protons and neutrons each have an atomic mass of 1 g/mol (amu

Chemistry Definition Added By: Jayden

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