THE HEAVIEST NOBLE GAS Crossword Clue
THE HEAVIEST NOBLE GAS Crossword Clue
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Crossword Puzzle Infos
The heaviest noble gas is RADON, which has an atomic number of 86 and is a radioactive, colorless, odorless, tasteless noble gas. It is the only member of its group in the periodic table and is produced naturally by the decay of radium and uranium. RADON is the most dense of all the noble gases and is considered to be a health hazard due to its radioactivity.