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OpenStudy (anonymous):
The various atomic masses of the same element are called neutrino positron critical mass isotopes
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OpenStudy (anonymous):
@misssunshinexxoxo
OpenStudy (misssunshinexxoxo):
The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
OpenStudy (misssunshinexxoxo):
D is the best choice
OpenStudy (anonymous):
thanks
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