Physics 9702 · AS & A Level · Atoms, nuclei and radiation

Atoms, nuclei and radiation — practice question

An unstable nucleus undergoes decay by releasing a $\beta^{+}$ particle. Which statement is correct?

  • AAn antineutrino is also emitted.
  • BA neutron changes into a proton.
  • CMass-energy is conserved.
  • DThe nucleon number is not conserved.

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