Atomic Number 54     Atomic Mass 131.29      State gas

Color colorless     Electronegativity 2.6

Melting Point -111.9°C     Boiling Point -107.1°C

Natural Isotopes Xe-124 0.10%   Xe-126 0.09%   Xe-128 1.91%
      Xe-129 26.4%   Xe-130 4.1%   Xe-131 21.2%   Xe-132 26.9%
      Xe-134 10.4%   Xe-136 8.9%

Abbreviated Electron Configuration [Kr] 4d¹⁰ 5s² 5p⁶

Discovered by Sir William Ramsay and Morris W. Travers in 1898.