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KCET2009PhysicsNuclear Physics

-decay means emission of electron from

Options

  1. Ainnermost electron orbit
  2. Ba stable nucleus
  3. Coutermost electron orbit
  4. Dradioactive nucleus

Correct answer

D. radioactive nucleus

Step-by-step solution

-emission takes place from a radioactive nucleus as ₁₅³² P - ₁₆³² ~S + _ -1 e ⁰+ v where v is the anti-neutrino. In ⁺ decay a positron is emitted as ₁₁²² Na ₁₀²² Ne + _ +1 e ⁰+ v where v is the neutrino.

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