5297141
Description
Flashcards by Sarah Collinson, updated more than 1 year ago
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Created by Sarah Collinson
almost 8 years ago
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| Question | Answer |
| What are the three types of radiation emitted during decay? | - Alpha α - Beta β - Gamma γ |
| What is the structure of an alpha particle? | 2 protons + 2 neutrons |
| What is the charge and mass of an alpha particle? | - Charge = +2 - Mass = 4 |
| Which element is an alpha particle the nucleus of? | Helium |
| What is the range in air of an alpha particle? | A few cm, will be stopped by skin or paper |
| What is a beta particle and how is it formed? | An electron ejected from the nucleus when a neutron breaks down into a proton and an electron |
| What is the charge and mass of a beta particle? | - Charge = -1 - Mass = 0 (negligible) |
| What is the range in air of a beta particle? | 1 metre, will be stopped by a few mm of aluminium |
| What is a gamma ray? | En electromagnetic wave |
| What is the charge and mass of a gamma ray? | - Charge = 0 - Mass = 0 |
| What is the range in air of a gamma ray? | Unlimited in air, will be stopped by a few feet of concrete |
| Define ionisation | Where nuclear radiation travels through a material and collides with the atoms, knocking electrons off and creating ions |
| Give the three types of radiation in order from most to least ionising | - Alpha - Beta - Gamma |
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