During β⁻ decay, which change takes place to the quark composition of the nucleus that emits the β⁻ particle, and which other particle is emitted? [Table with columns: quark change, other particle emitted. Rows for A, B, C, D show different changes and particles.]
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✓ Correct answer
A: quark change: down to up, other particle emitted: antineutrino
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