3279947
Description
Flashcards by Alfonzzzo R, updated more than 1 year ago
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Created by Alfonzzzo R
over 9 years ago
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| Question | Answer |
| Radioactivity | GCSE Physics P2.5 |
| Name the three types of radiation. | Alpha, Beta and Gamma. |
| Which type of radiation has the most penetrating power? | Gamma. |
| Which type of radiation has the least penetrating power? | Alpha. |
| Which type of radiation has the longest range? | Gamma. |
| Which type of radiation has the shortest range? | Alpha. |
| Which type of radiation is the most dangerous to humans, when outside of the body? Why? | Gamma. It can enter the body very easily. |
| Which type of radiation is the least dangerous to humans, when outside of the body? Why? | Alpha. It is prevented from entering the body by the skin. |
| Which type of radiation is the most dangerous to humans, when inside of the body? Why? | Alpha. It is more likely to hit any cells. |
| Which type of radiation is the least dangerous to humans, when outside of the body? Why? | Gamma. It is less likely to hit any cells. |
| Which types of radiation are affected by magnetic fields? | Alpha and beta. |
| What charge do each of the types of radiation have? | Alpha: +2. Beta: -1. Gamma: ±0. |
| What is an alpha particle made of? | Two neutrons and two protons. OR A helium nucleus. |
| What effect does an alpha particle have on the: i) Atomic mass? ii) Atomic number? | i) Goes down by 4. ii) Goes down by 2. |
| What is a beta particle made of? | An (high energy) electron. |
| What effect does a beta particle have on the: i) Atomic mass? ii) Atomic number? | i) Stays the same (no effect). ii) Goes up by 1. |
| Why does the atomic number go up when a beta particle is released? | A neutron is split into a proton and an electron. The electron is then released (this is the beta particle). Therefore the particle gains a proton. |
| What is a gamma particle made of? | High energy electromagnetic radiation. |
| What effect does a gamma particle have on the: i) Atomic mass? ii) Atomic number? | i) Stays the same (no effect). ii) Stays the same (no effect). |
| What is the range in air for the different types of radiation? | Alpha: 25cm. Beta: 10-100m. Gamma: Kilometres. |
| Name a use for each type of radiation. | Alpha: Smoke alarms. Beta: Thickness of metal in production. Gamma: Sterilising medical equipment. |
| What are the different types of radiation stopped by? | Alpha: A sheet of paper. Beta: A few millimetres of aluminium. Gamma: A few centimetres of lead. |
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