Physics · Atomic Physics
The mass number of an atom is equal to ________.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1the number of protons only
- 2the number of protons and electrons
- 3the number of nucleons (protons + neutrons)✓
- 4the number of neutrons only
Correct answer
the number of nucleons (protons + neutrons)
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