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How do you calculate atomic mass from an isotope?

How do you calculate atomic mass from an isotope?
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How do you calculate atomic mass from an isotope?

User Vikast
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The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass number of 35 amu. To calculate the averageatomic mass, multiply the fraction by the mass number for eachisotope, then add them together.
User Singulus
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