Radioactivity 0.0 / 5 ? PhysicsRadioactivityatomsGCSEOCR Created by: Chrissie.Created on: 01-05-17 13:13 63215 Across 1. radioactive elements found in nature (10, 9) 5. can be stopped by lead (5) Down 1. can be stopped by aluminium (4) 2. releasing ionizing radiation (11) 3. atoms with the same number of protons, but different number of neutrons (7) 6. can be stopped by paper (5)
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