During a negative β-decay,
Correct answer: C. A neutron in the nucleus decays emitting an electron
- A. An atomic electron is ejected
- B. An electron which is already present with in the nucleus is ejected
- C. A neutron in the nucleus decays emitting an electron
- D. A part of binding energy of nuclei is converted into electron
Explanation
When ratio of neutrons to protons is more than one, then neutrons convert into protons by emitting an electron. Electrons do not come out from nucleus as nucleus contains no electrons, therefore, neutrons in the nucleus decay converting into electron and emitting electron.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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