The heaviest useful cut of cryogenic air distillation (Xe boils at 165 K), taken from the oxygen-rich stream and cleaned by adsorption.
Research Elements Xe · atomic number 54 Noble gas · period 5, group 18 [Kr] 4d10 5s2 5p6 Shells: 2, 8, 18, 18, 8 Valence electrons: 8 in the outer shell (5s2 5p6) Green dots are the outer shell's s and p electrons. Softer green dots are the d electrons of transition metals, and the d and f electrons of lanthanides and actinides: they often take part in bonding, but not always. Grey dots are the core. Ground-state configuration from the NIST Atomic Spectra Database (A. Kramida, Yu. Ralchenko, J. Reader and the NIST ASD Team). Abundance is the mole fraction of the element found as that isotope on Earth; digits in parentheses are the uncertainty in the last digits. Masses and abundances from NIST, Atomic Weights and Isotopic Compositions (J. S. Coursey, D. J. Schwab, J. J. Tsai and R. A. Dragoset, National Institute of Standards and Technology).Xenon
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 124Xe 123.9058920(19) 0.000952(3) 126Xe 125.9042983(38) 0.000890(2) 128Xe 127.9035310(11) 0.019102(8) 129Xe 128.9047808611(60) 0.264006(82) 130Xe 129.903509349(10) 0.040710(13) 131Xe 130.90508406(24) 0.212324(30) 132Xe 131.9041550856(56) 0.269086(33) 134Xe 133.90539466(90) 0.104357(21) 136Xe 135.907214484(11) 0.088573(44)