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Radon
(Rn)
000
281832188
Rn
Category
Noble gas
Relative atomic mass
222
Density
0.00973
Melting point (°C)
202
Boiling point (°C)
211
Electronegativity (Pauling)
2.2
Half-life
3.82 d
Discovery year
1900
Discovered by
William RamsayMorris William Travers
Electrons: 86
Protons: 86
Neutrons: 136

Wikipedia

Wikipedia
Decay chain
  1. Rn-222(3.82 d)
    α decay
  2. Po-218(3.10 min)
    α decay
  3. Pb-214(26.8 min)
    β⁻ decay
  4. Bi-214(19.9 min)
    β⁻ decay
  5. Po-214(164 µs)
    α decay
  6. Pb-210(22.2 y)
    β⁻ decay
  7. Bi-210(5.01 d)
    β⁻ decay
  8. Po-210(138.4 d)
    α decay
  9. Pb-206(stable)stable
created by @lukaswyss
Radon (Rn) – Element 86