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The Nucleus — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsThe Nucleus1 Mark
Question
During a negative beta decay:
  1. An atomic electron is ejected.
  2. An electron which is already present within the nucleus is ejected.
  3. A neutron in the nucleus decays emitting an electron.
  4. A proton in the nucleus decays emitting an electron.
✓

Answer

  1. A neutron in the nucleus decays emitting an electron.
Explanation:
Negative beta decay is given as
$\text{n}\rightarrow\text{p + e}^-+\bar{\text{v}}$
Neutron decays to produce proton, electron and anti-neutrino.

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