Radon (Rn) information
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Radon was the fifth radioactive element to be discovered, after uranium, thorium, radium and polonium. Radon gas is colorless, but it exudes a brilliant yellow phosphorescence (light emitted from a substance without perceptible heat) at temperatures below its freezing point.
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Radon (Rn) is a noble gas with atomic no 85 which lies in group 18 and period 6 in periodic table.
It has a complete octet and is radioactive, tasteless and odourless element.
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