The nuclides (a nuclide is the general name for any nuclear species) $_6C^{12}$,$_{26}Fe^{56}$,and $_{92}U^{238}$ have $12$,$56$,and $238$ nucleons respectively in their nuclei. The total number of nucleons in a nucleus is equal to:
- AThe total number of neutrons in the nucleus
- BThe total number of neutrons in the atom
- CThe total number of protons in the nucleus
- DThe total number of protons and neutrons in the nucleus
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