duhitsmadi9745 duhitsmadi9745

21-01-2024
Chemistry

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Which description most accurately describes neptunium-239?
a) mass number=93, atomic number=239
b) mass number=93, number of neutrons=146
c) mass number=146, atomic number=93
d) number of protons=93, number of neutrons=146
e) number of protons=93, atomic number=239

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