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Description
Flashcards by gatha.jayamohan, updated more than 1 year ago
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Created by gatha.jayamohan
over 11 years ago
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| Question | Answer |
| Alpha Particles | Most Ionising Least Penetrating-paper/skin |
| Beta Particles | Mid Ionising Mid Penetrating-thin metal |
| Gamma Rays | Least Ionising Most Penetrating - lead |
| Nuclear Fusion | when two hydrogen nuclei are brought close together and fuse -releases a lot of energy |
| Isotopes | atoms of an element that have a differet mass number due to a different number of neutrons |
| E=mc2 | E=energy produced M=change in mass C=speed of light calculates energy released during fission+fusion |
| Alpha Decay | when alpha particles is emitted from the nucleus=lost 2p+2n atmos mass-4, atomic number-2 =new element, 2 places back |
| Beta Decay | neutron changes into p + an e p stays+e leaves atom (b particles) nucleus-1+p,1-n atomic number+1 |
| Half Life | time taken for number of atoms to halve (decay) |
| Radioactive Decay | when unstable atoms break down and change into a different type of atom |
| Background Radiation | cosmic rays, plants, animals, rocks |
| Irridation | cells are directly damaged by radiation of a material |
| Contamination | damage produced by inhaled radiation |
| Radiotherapy | using high doses of ionising radiation to kill cancerous cells x-rays or in body |
| Sterilisation | gamma radiation kills microorganisms |
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