A beta-particle is an electron travelling at high speed. Which statement describes how beta-particles are released from an atom?
- AAn electron is emitted as a beta-particle from an inner electron shell of the atom.
- BAn electron is emitted as a beta-particle from an outer electron shell of the atom.
- CA neutron changes into a proton and a beta-particle is emitted from the nucleus.
- DA proton changes into a neutron and a beta-particle is emitted from the nucleus.