Radon

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Radon

Radon-222 was a substance that decayed rapidly. (TV: The Leisure Hive (episode 2) [+]Loading...{"ep":"2","1":"The Leisure Hive (TV story)"})

Cardiff Council believed that the energy of the Cardiff Space-Time Rift was a deposit of radon. (AUDIO: The House of the Dead)

v • e
Elements
Periodic table
Hydrogen1 • Helium2 • Lithium3 • Beryllium4 • Boron5 • Carbon6 • Nitrogen7 • Oxygen8 • Fluorine9 • Neon10 • Sodium11 • Magnesium12 • Aluminium13 • Silicon14 • Phosphorus15 • Sulphur16 • Chlorine17 • Argon18 • Potassium19 • Calcium20 • Titanium22 • Vanadium23 • Chromium24 • Manganese25 • Iron26 • Nickel28 • Copper29 • Zinc30 • Gallium31 • Arsenic33 • Zirconium40 • Molybdenum42 • Rhodium45 • Palladium46 • Silver47 • Cadmium48 • Tin50 • Antimony51 • Tellurium52 • Caesium55 • Terbium65 • Erbium68 • Thulium69 • Tantalum73 • Tungsten74 • Iridium77 • Platinum78 • Gold79 • Mercury80 • Lead82 • Bismuth83 • Radon86 • Radium88 • Thorium90 • Uranium92 • Neptunium93 • Plutonium94 • Californium98 • (Ek104) • Dubnium105
Universal
periodic table
Greek elements
Water • Earth • Fire • Air
Chinese elements
Water • Earth • Fire • Wood • Metal
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