Radon
20 
A colourless, odourless gas with a relatively short half-life. Found in both Radioactive and Frozen atmospheres, this gas is produced by the decay of other high-energy elements.
Refining
20
A colourless, odourless gas with a relatively short half-life. Found in both Radioactive and Frozen atmospheres, this gas is produced by the decay of other high-energy elements.
