MCQ
Mass number is:
- ANeutron + proton
- BNeutron + electron
- CProton + electron
- DNeutron + proton + electron
✓
Answer
- Neutron + proton
Explanation
The mass number, also called atomic mass number, is the total number of protons and neutrons in an atomic nucleous.i.e. Mass number = Neutron + Proton.
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