• Year 10 Physics
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  • Which isotope of carbon is used in radiocarbon dating?
    Carbon-14. Because carbon-14 is a radioactive isotope that decays over time, organisms with less carbon-14 are older due to radioactive decay.
  • An atom has 6 protons, 10 neutrons, and 6 electrons. What is its atomic number?
    6
  • How is the atomic number of an element calculated?
    The atomic number of an element is equal to the number of protons.
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