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Atomic mass number of an element is 232 ...

Atomic mass number of an element is 232 and its atomic number is 90 . The end of radioactive disintegration we obtain an isotope of lead with A = 208 and Z = 82 . Then the number of emitted alpha and beta particles are

A

`alpha=3,beta=3`

B

`alpha=6,beta=4`

C

`alpha=6,beta=0`

D

`alpha=4,beta=6`.

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