Consider an isotope of sodium with a mass number of 25. The number of neutrons in this isotope of sodium is
A)32.
B)11.
C)16.
D)25.
E)14.

Name: Consider an isotope of sodium with a mass number of 25. The number of neutrons in this isotope of sodium is A)32. B)11. C)16. D)25. E)14.
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Quizplus · Accepted Answer

The atomic number of sodium is 11, which means it has 11 protons. The mass number is the sum of protons and neutrons. Therefore, the number of neutrons is 25 (mass number) - 11 (protons) = 14.

Consider an Isotope of Sodium with a Mass Number of 25