Consider a sample of a pure beta-active materialA. All the beta particles emitted have the same energyB. The beta particles originally exist inside the nucleus and are ejected at the time of the beta decayC. The antineutrino emitted in a beta decay has zero rest mass and hence zero momentum.D. The active nucleus changes to one of its isobars after the beta decay

Consider a sample of a pure beta-active materialA. All the beta partic

1.	Consider a sample of a pure beta-active materialA. All the beta particles emitted have the same energyB. The beta particles originally exist inside the nucleus and are ejected at the time of the beta decayC. The antineutrino emitted in a beta decay has zero rest mass and hence zero momentum.D. The active nucleus changes to one of its isobars after the beta decay
Answer» Correct Answer - D (A) The emitted `beta`-particles may have varying energy. (B) `e^(-)` or `e^(+)` does not exists inside the nucleus. (C ) `overset(-)v` does carry momentum. (D) In `beta`-decay mass number does not change.

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The binding energy per nucleon number for deutron `H_(1)^(2)`and helium ` He_(2)^(4)` are `1.1 MeV` and `7.0 MeV` respectively . The energy released when two deuterons fase to form a belium nucleus `He_(2)^(4)` is ……..A. `2.2MeV`B. `23.6MeV`C. `28.0MeV`D. `30.2MeV`
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