What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common? 1. same number of electrons 2. same number of protons 3. same number of neutrons and electrons 4. same number of neutrons and protons 5. same number of protons and electrons 6. same mass 7. same number of neutrons

The most common of these is carbon 12, 13, 14. All of these isotopes have the same atomic number but different mass numbers. Carbon has the atomic number of 6 which means that all isotopes have the same proton number. However, the number of neutrons is different, thus giving different mass numbers.

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okay i have so many questions. but the big one here is: um wt..f is this mess? ?