P6- Radioactive Materials
- Created by: Katherine
- Created on: 02-06-13 12:16
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- Radiation is ionising and can cause damage or kill living cells
- Can be natural or man made
- Elements have more then one atom, some of which can be radioactive yet almost identical to that of the other atoms, within it's properties
- Radioactive Decay> Spontaneous decay change in an unstable giving out Alpha, Beta and Gamma radiation
- In atoms in which the Nucleus is unstable, the atoms decay to become more stable. They emit energetic radiation and there nucleus changes
- Radio active decay doesn't affect any physical or chemical change with in the atom
- Radioactive Platinum decays to turn into gold (via Beta Radiation)
- Atom model dates back to 1910, experimented by Ernest Rutherford
- Rutherford designed an experiment with his assistants Hans Geiger and Ernest Marshden
- They did this by:
- Using gold foil as it rolled out thinly to the thickness of just a few atoms
- Directed Alpha radiation at the foil
- There should be flashes of light as the radiation strike the material
- They worked all night counting the flashes from different angles.
- They observed that most of the particles passed straight through the foil
- A small fraction of the particles reflected back towards the source
- Rutherford released there was a positive charge…
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