Radioactive Substances
- Created by: RowanHall
- Created on: 02-06-10 13:22
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Radioactive Substances
An atom is the smallest lump of an element that is still that element
All atoms contain 3 sub-atomic particles-
- Negatively - charged electrons that whizz around the nucleus
- Positively- charged protons in the nucleus
- No- charge neutrons in the nucleus
In a atom, the protons and electrons are balanced
The number of protons establishes the element
A change…
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