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B
Two extra protons and no extra electron.
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C
Two extra neutrons and no extra electron.
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D
Two extra neutrons and two extra electrons.
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Solution
The correct option is D Two extra neutrons and no extra electron. Carbon−14 or radiocarbon is a radioactive isotope of carbon with a nucleus containing 6 protons and 8 neutrons while C−12 contains 6 protons and 6 neutrons.