the mass number is an average of the masses of all naturally occurring isotopes of an element true or false

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23-01-2017
Chemistry

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the mass number is an average of the masses of all naturally occurring isotopes of an element true or false

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SapphireMoon SapphireMoon · Answer 1 · 2017-01-23T21:23:27+01:00

SapphireMoon SapphireMoon

23-01-2017

False. The mass number is the sum of the protons and neutrons in the most common isotope. The atomic weight or atomic mass is the average of the masses of the naturally occurring isotopes.

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