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Question

21483Biαemission−−−−−−−−−−Aβemission−−−−−−−−−−Bβemission−−−−−−−−−−Cβemission−−−−−−−−−−Dαemission−−−−−−−−E
'E' is an element of stable nucleus. What is the element 'E'?

A
20781Tl
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B
20682Pb
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C
20680Hg
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D
20679Au
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Solution

The correct option is A 20682Pb
α-decay
AZXαA4Z2Y
β-decay
AZXβAZ+1Y
21483Biα21081[A]β21082[B]β21083[C]β21084[D]α20682Pb
The element E is 20682Pb.

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