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- Which has greater ionising power : alpha particle or beta particle ?
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- What are gamma-rays?
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- Why do alpha particles have a hight ionising power?
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- What are radio-isotopes? What are their applications?
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- What do you mean by activity of a radioactive substance ?
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- Natural radioactive nuclei are nuclei of high mass number.Why?
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- A nucleus contains no electrons, but can eject them. Why?
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