Multiple choice

Which of the following statements about radioactive disintegration is not correct?

  1. Actinium series emits 6α and 4β particles.

  2. The end product of 4n+3 series is Pb-207.

  3. The end product of 4n+2 disintegration series is Pb-206.

  4. Neptunium series is artificial radioactive disintegration series.

  5. Starting element of 4n disintegration series is Th-232.
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A Correct answer
Explanation

4n+3 disintegration series (Actinium series): Starting element - U-235 End product - Pb-207 Emits 7α and 4β particles Natural radioactive disintegration series

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