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An atom which has a mass number of 14 and has 8 neutrons is an:

1. isotope of oxygen
2. isobar of oxygen
3. isotopes of carbon
4. isobar of carbon

Correct answer: isotopes of carbon

Solution

Mass number 14 with 8 neutrons means the atom has 6 protons, so it is carbon. Since it is a carbon atom with a different mass number than the common form, it is an isotope of carbon.

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