Radioactivity 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: emiliannaCreated on: 06-11-17 13:44 9631028174 Across 1. the number of unstable atoms that decay per minute (8) 3. atoms of the same element with a different number of neutrons (7) 4. the number of protons + neutrons (4, 6) 8. type of radiation that is stopped by aluminium (4) Down 2. the number of protons (6, 6) 3. a process when atoms or molecules become charged (10) 6. the process where certain nuclei split into two fragments, releasing energy (7, 7) 7. type of radiation that is stopped by lead (5) 9. what a radioactive substance contains (8, 6) 10. early model of the atom with positive and negative particles (4, 7)
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