Carbon-14 decays into nitrogen-14 by emitting a ${\beta ^ - }$ particle.
Which statement explains why the ${\beta ^ - }$ particles are emitted with a range of different kinetic energies?
1 )
The carbon-14 nuclei have slightly different masses.
2 )
The emitted ${\beta ^ - }$ particles have a range of different masses.
3 )
The energy released in the decay process is different for each carbon-14 nucleus that decays.
The energy released in the decay process is shared between the nitrogen-14 nucleus, a ${\beta ^ - }$ particle and an antineutrino.
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