1858964
Flashcards by Abbie Vasili, updated more than 1 year ago
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Created by Abbie Vasili
over 6 years ago
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Description
| Question | Answer |
| What is an atom made up of? | Protons, Neutrons and electrons. |
| Give the charge and mass of: Proton Neutron Electron | Proton: Mass (1) and Charge (+1) Neutron: Mass (1) and Charge (0) Electron: Mass (1/2000) and Charge (-1) |
| Properties of Alpha radiation. | It is a helium nuclei, it is slow and heavy. It is strongly ionising and penetrates weakly. It is stopped by paper. |
| Properties of Beta radiation. | Beta is a electron which is light and fast. It is moderately ionising and penetrates moderately. It is stopped by thin metal. |
| Properties of Gamma Rays. | Gamma rays are electromagnetic waves with a high frequency. The have no mass and are very fast. They are weakly ionising; they penetrate strongly and have to be stopped by thick lead or concrete. |
| What is a positron? | Positron is the antiparticle of the electron. This means they are like electron, they've got the same mass but different relative charge (+1). They have the same properties as electrons (light and fast, stopped by thin metal and moderately ionising). |
| What is it called when a positron means an electron? | This is called annihilation. |
| What is positron radiation? | Positron radiation is positively charged beta radiation. |