The light head cut from a cryogenic air distillation column (Ne boils at 27 K, well below N2), then rectified against He to pull out the last impurities.
Research Elements Ne · atomic number 10 Noble gas · period 2, group 18 [He] 2s2 2p6 Shells: 2, 8 Valence electrons: 8 in the outer shell (2s2 2p6) 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).Neon
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 20Ne 19.9924401762(17) 0.9048(3) 21Ne 20.993846685(41) 0.0027(1) 22Ne 21.991385114(18) 0.0925(3)