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11 March, 18:47

Which unstable element is used to determine the age of volcanic rock?

argon

carbon-14

potassium

carbon-12

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Answers (2)
  1. 11 March, 21:15
    +1
    C

    Potassium

    Explanation:

    Just took test on Ed2020
  2. 11 March, 22:27
    +1
    Potassium.

    Explanation:

    Therefore, the answer is Potassium. You might think, that because we were talking about Argon as well, the answer is both of them, but no. Everything starts with Potassium but it decays into Argon during the process.
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