Q13 of 94 Page 440

During a negative beta decay,

Negative beta decay is a process in which an unstable nucleus, formed with more number of neutrons than needed for stability, tries to go towards stability by converting a neutron to a proton. In this process, the unstable nucleus emits an electron and an antineutrino i.e. . Thus, we can say that a neutron in the nucleus decays, emitting an electron.

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The decay constant of a radioactive sample is λ. The half-life and the average-life of the sample are respectively.