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Question

The balanced nuclear equations for each of the following:
α-emission from bismuth-189

A
18993Bi44He+18581Tl
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B
18983Bi42He+18581Tl
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C
18973Bi43He+18581Tl
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D
None of these
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Solution

The correct option is D 18983Bi42He+18581Tl
The reaction involving α-emission from bismuth-189 is given below:

18983Bi42He+18581Tl

As in this case both atomic and mass number is conserved (sum is equal)

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