What is the mass number of an atom that is made up of 27 protons, 32 neutrons, and 27 electrons?
A) 89
B) 59
C) 32
D) 27

Name: What is the mass number of an atom that is made up of 27 protons, 32 neutrons, and 27 electrons? A) 89 B) 59 C) 32 D) 27
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Quizplus · Accepted Answer

The mass number of an atom is the sum of its protons and neutrons. Therefore, mass number = number of protons + number of neutrons = 27 + 32 = 59. Therefore, the best choice is B.

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