Radioactivity
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is Radioactivity? | Radioactivity is the spontaneous breaking up of a certain unstable nuclei accompanied by the emission of radiation.
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| Who discovered Radioactivity? | Henri Becquerel, a French Scientist.
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| How did he discover radioactivity? | He did this by exposing crystals of uranium of sunlight on a photographic plate. An image resulted on the photographic plate. He thought the energy from the sun was released.
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| What are alpha particles? | Alpha particles are helium nuclei He(2)(4) with a positive charge with a little penetrating ability,can be stopped by a piece of paper.
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| What are Beta particles? | They are electrons with a negative charge (-) and are greater penetrating ability. Can be stopped by 5mm Alliminium.
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Created by:
Elif07
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