Atomic number, mass number, and isotopes | Chemistry | Khan Academy
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Atomic number, mass number, and isotopes | Chemistry | Khan Academy
How to use the atomic number and the mass number to represent different isotopes Watch the next lesson: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/v/atomic-weight-and-atomic-mass?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Missed the previous lesson? https://www.khanacademy ...
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