April 2020
Intermediate to advanced
296 pages
5h 20m
English

Rn’s the rarest noble gas, more dense than air by eight,
Set free through Ra’s slow decay to blithely emanate.
Hot bub’ling springs in days of yore,
Enhanced its therapeutic lore.
But should its daughters fill your den, seal up, or ventilate!
arr-enns
THE LAST OF THE GROUP 18 NOBLE GASES
Radon is the last and the rarest of the recognized27 noble gases. Although more or less chemically inert like the other noble gases, radon by contrast is also radioactive. The element holds the distinction of being the heaviest of all gases with a density almost eight ...