GK
BASIC GENERAL KNOWLEDGE
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 Question 
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 Radioactive substances can be produced readily in 
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  an atomic pile 
 
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  an electron gun 
 
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  a transistor 
 
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  a Wilson cloud chamber 
 
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 Explanation: 
Detailed explanation-1: -Radioactive substances can be produced readily in an atomic pile. 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.
Detailed explanation-2: -The radioactivity of radium then must be enormous. This substance is the most radioactive natural element, a million times more so than uranium.
Detailed explanation-3: -There are four types of radiation given off by radioactive atoms: Alpha particles. Beta particles. Gamma rays.
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