write a short note on radioactive substances
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Radioactive waste includes certain substances which would be radioactive material if they were not waste, or substances which have been contaminated by radioactive material or other radioactive waste. It can be in a solid, liquid or gaseous form.
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Answer:Radioactive substances are atoms that decay naturally. They can give off alpha particles, beta particles and gamma radiation. Unlike X-ray sources they cannot be turned off, so their control is more difficult.
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