What is true of an element of atomic number 15 that has an isotope of mass number 32? (There could be more than one correct choice.)
A) the number of neutrons in the nucleus is 17.
B) the number of protons in the nucleus is 15.
C) the number of neutrons in the nucleus is 15.
D) the number of protons in the nucleus is 32.
E) the number of nucleons in the nucleus is 47.
Correct Answer:
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