The unstable nucleus 82212Pb decays with β-particle emission, having a half-life of 10 h. From this it follows that theA : mass number of the product is 212B : atomic number of the product is 81C : fraction of the original isotope remaining after 20 h is 14D : product nucleus formed belongs to same groupSelect the correct alternate.

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A,B and C

A and C

B and D

Only D

answer is B.

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Detailed Solution

.once beta particle is emitted atomic number increases by one unit, therefore its group also changes in this case

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