P4 Radioactivity 5.0 / 5 based on 5 ratings ? PhysicsRadioactivityGCSEOCR Created by: [email protected]Created on: 14-12-14 18:06 92637511084 Across 1. What is an alpha particle (6, 7) 4. What type of radioactivite particle consists of two protons and two neutrons? (5) 5. With alpha decay, the mass number goes down by how many? (4) 6. What type of radioactivity is a fast moving electron? (4) 10. Gamma radiation is stopped by a thick sheet of... what? (4) Down 2. What is the name of the graph that shows the how radioactivity reduces over time? (8, 5) 3. The radioactivity of an isotope took 4 hours to decrease from 100Bq to 25Bq. What is its half-life? (3, 5) 7. Radioactivity is the decay of which part of the atom? (7) 8. Which type of radioactivity is the more penetrating (5) 9. What is the name of the equipment used to measure radioactivity? (6, 7)
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