The nucleus of an atom contains 92 protons and 146 neutrons. What is the nucleon number of this atom?
A146
B92
C238CORRECT
D54
GCEPhysicsAtomic and Nuclear Physics2019
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Why the answer is C, and why the others tempt you.
The nucleon number (mass number) is the total number of protons and neutrons in the nucleus. Adding 92 protons and 146 neutrons gives 92 + 146 = 238. This represents the uranium-238 nucleus.
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