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Question 17: How many α decay occur in the decay of thorium 90Th 298 into 82Pb282?

ANSWER

The difference in the charge numbers of 90Th 298 and 82Pb282 is 8 units and the difference in mass number is 16 units. An α decay is the emission of 2He4 nucleus. Therefore, in the given decay 4 α particles will be emitted.

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