1. What effects can radiation have on living cells? Change the nature of cells Kill cells answer
. 2 Give two examples of radiation being used in medicine to kill cells. answer Sterilising surgical instruments Killing cancerous cells
3. What is the central part of the atom called? The nucleus answer
4.Name the particles orbiting around the nucleus.. Electrons answer
5. Name the particles found in the nucleus. Protons and neutrons answer
6. State the charge on the Electron ProtonNeutron Negative Positive None answer
7.Name the three types of nuclear radiation. Alpha (α)Beta (β) Gamma ( ϒ ) answer
8.Which radiation has the shortest range in air? Alpha (α). answer
9.What types of radiation would not pass through a 5mm thick sheet of aluminium ? Alpha (α) and Beta (β) answer
Q10 What is meant by ionisation? The addition, or removal, of an electron from an uncharged atom. answer
11. Some radiation detectors rely on ionisation. Name one such device Geiger-Muller tube answer
12. Define Absorbed Dose of radiation. The energy transferred per kilogram of the absorbing material. answer
13. State the unit of Absorbed Dose. Gray (Gy) answer
14. State 3 factors which determine the biological harm from exposure to radiation. The absorbed dose The type of radiation The body organs /tissue exposed answer
15. What quantity measures the biological effect of radiation on human tissue? Equivalent Dose (H) answer
16. State the unit of Equivalent Dose. Sieverts (Sv) answer
17.What is the name of the process in which a large nucleus splits into two smaller nuclei ? Nuclear Fission answer
18. Name two types of nuclear fission Spontaneous fission Induced fission answer
19. Nuclear fusion takes place in the sun. Briefly describe what happens in this process. Two “light” nuclei join together releasing energy. answer
20. Physicists are currently trying to produce Fusion reactions. How would success be of benefit to society? It could produce large amounts of relatively “clean” energy answer