When Uranium- ⋅238 undergoes alpha decay and then one beta decay the resulting isotope is :
A
Th−234
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B
U−234
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C
Pa−234
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D
Th−230
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E
Ra−226
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Solution
The correct option is EPa−234 When Uranium−238 undergoes alpha decay and then one beta decay the resulting isotope is Pa−234 23892U→23490Th+42He→23491Pa+0−1β