Question

multiple select question
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carbon - 12
□ has 12 protons and 12 neutrons
□ has a mass number of 12
□ is an isotope of carbon
□ has 6 protons and 6 neutrons
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Explanation:

Carbon - 12 is an isotope of carbon. The mass number of an atom is the sum of protons and neutrons. For carbon - 12, the mass number is 12, and it has 6 protons and 6 neutrons.

Answer:

B. has a mass number of 12
C. is an isotope of carbon
D. has 6 protons and 6 neutrons