A carbon atom with 6 protons and 7 neutrons has a mass number of

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Multiple Choice

A carbon atom with 6 protons and 7 neutrons has a mass number of

Explanation:
Mass number is the total count of nucleons in the nucleus, i.e., protons plus neutrons. This carbon atom has 6 protons and 7 neutrons, so its mass number is 6 + 7 = 13. The mass number reflects the total number of nucleons and is not the same as the number of protons alone (which is 6) or neutrons alone (which is 7). Hence 13 is the correct mass number.

Mass number is the total count of nucleons in the nucleus, i.e., protons plus neutrons. This carbon atom has 6 protons and 7 neutrons, so its mass number is 6 + 7 = 13. The mass number reflects the total number of nucleons and is not the same as the number of protons alone (which is 6) or neutrons alone (which is 7). Hence 13 is the correct mass number.

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