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Orlando Gomez
Chemistry
1 February, 09:56
What defines the mass number of an isotope
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Chica
1 February, 10:15
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The mass number of an isotope is determined by the number of neutrons in the isotope plus the number of protons.
For instance Carbon-13 is an isotope of carbon. The "13" is the mass number of the isotope.
So, in this example, 13 = #protons + #neutrons
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