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19 May, 17:31

Which radioisotope emits alpha particles?

(1) Fe-53 (3) Au-198

(2) Sr-90 (4) Pu-239

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Answers (2)
  1. 19 May, 18:33
    0
    The answer is (4) Pu-239. The decay mode of Pu-239 is α decay which means it will emit alpha particles. The other three have the decay mode of β decay.
  2. 19 May, 21:28
    0
    Answer : Option 4) Pu-239

    Explanation : Plutonium-239 is a radioisotope of the element plutonium which emits alpha particles. The decaying process of Pu-239 emits alpha particles. It is widely used as a nuclear reactor fuel. Pu-239 is also used as a primary fissile isotope for the production of nuclear weapons.
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