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OpenStudy (anonymous):
How is the number of neutrons in the nucleus of an atom calculated?
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OpenStudy (aaronq):
subtract the atomic number (number of protons) from the atomic mass (neutrons and protons).
OpenStudy (anonymous):
You cannot calculate the number of neutrons if you don't have the mass number (A) of the atom. You can have several variations (isotopes) of the same atom. For example H can have 0, 1 or 2 neutrons.
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