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Carbon's atomic number (on the Periodic Table) is 6, which means it has 6 protons. Carbon 12 denotes its molecular weight of 12 atomic units.

A simple calculation and one can deduce that carbon 12 contains 6 protons and 6 neutrons. Since the number of protons a molecule has determines the number of electrons it has when it has a neutral charge, we can assume that it will have 6 electrons as well.

Assuming a particular carbon 12 atom is neutrally charged, it would have 18 particles, 6 protons, 6 neutrons, and 6 electrons.

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Q: How many protons does an atom of carbon-12 have?
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