Which describe beta decay? Check all that apply.

In beta-minus decay, a neutron changes into a proton and emits an electron (and an antineutrino), so B describes it. In beta-plus decay, a proton changes into a neutron and emits a positron (and a neutrino), so A describes it. Beta decay releases energy, making D correct; a gamma ray or a helium-4 nucleus is not the defining particle emitted in these beta-decay processes.

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