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Which radioisotope is a beta emitter?(1) 90Sr (3) 37K(2) 220Fr (4) 238U

Which radioisotope is a beta emitter?(1) 90Sr (3) 37K(2) 220Fr (4) 238U
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Which radioisotope is a beta emitter?(1) 90Sr (3) 37K(2) 220Fr (4) 238U

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User RishiD
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The answer is (1) 90 Sr. The definition of beta decay is that a type of radioactive decay in which one proton will change to one neutron and release one electron inside the nucleus. And 90Sr is a common beta emitter.
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User Robinr
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