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 1

The nucleus emits a beta particle when a neutron inside it changes into a proton. The reaction is

\[\ce{\underset{\text{neutrons}}{_0^1n} -> \underset{\text{proton}}{_1^1p} +\underset{\text{β-paricles}}{_-1^0e} +\underset{\text{anti-neutrino}}{V}}\]