Practice question Two fusion events are recorded. In P, two light nuclei have a combined mass of 5.040 × 10⁻²⁷ kg and form a heavier nucleus of 5.020 × 10⁻²⁷ kg. In Q, the corresponding masses are 7.680 × 10⁻²⁷ kg and 7.620 × 10⁻²⁷ kg. Radiation is detected in both. Compare the events using calculations and explain the radiation energy.