Materials: with any one of a number of radioactive substances such as black uranium oxide, pitchblende, thorium nitrate and uranium nitrate and at a very small outlay.
Procedure:
- Lay down a penny or a small object on top of a dry plate
sealed in a black paper envelope, which is away from any light. - Lay the radioactive substance on top of the coin.
- Do not disturb for a few days.
- wash hands
- keep hands away from face/body
- careful with chemicals
- Radioactivity changes color
- Radioactivity rays changes the color of where it was put.
- Radium takes time to react.
- Light and placement effect the reaction of the radium.
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