Question
The nucleus of an atom does not contain electrons. Explain how is it possible for the nucleus to emit a beta particle which is fast moving electron.
✓
Answer
The nucleus emits a beta particle when a neutron inside it changes into a proton. The reaction is
$
\underset{\text { neutrons }}{1 n } \longrightarrow \underset{\text { proton }}{{ }_1^1 p }+\underset{\beta \text {-paricles }}{{ }_{-1}^0 e }+\underset{\text { anti-neutrino }}{ V }
$
$
\underset{\text { neutrons }}{1 n } \longrightarrow \underset{\text { proton }}{{ }_1^1 p }+\underset{\beta \text {-paricles }}{{ }_{-1}^0 e }+\underset{\text { anti-neutrino }}{ V }
$
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