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In the shell atomic model, electrons occupy various energy levels, or shells. The K and also L shells are shown for a neon atom.

Screened native the cell nucleus by intervening electrons, the outer (valence) electron of the atoms of the heavier noble gases are hosted less firmly and also can be eliminated (ionized) an ext easily native the atom than have the right to the electron of the lighter noble gases. The power required for the removed of one electron is called the very first ionization energy. In 1962, while functioning at the university of brothers Columbia, british chemist Neil Bartlett found that platinum hexafluoride would eliminate an electron native (oxidize) molecule oxygen to form the salt . The an initial ionization energy of xenon is really close to that of oxygen; for this reason Bartlett thought that a salt of xenon can be created similarly. In the very same year, Bartlett established that that is indeed feasible to eliminate electrons indigenous xenon by chemistry means. He confirmed that the interaction of PtF6 vapour in the visibility of xenon gas in ~ room temperature developed a yellow-orange solid link then formulated together . (This compound is now recognized to it is in a mixture of , , and PtF5.) shortly after the early stage report of this discovery, two various other teams that chemists individually prepared and subsequently report fluorides of xenon—namely, XeF2 and XeF4. These achievements were soon followed by the preparation of other xenon compounds and of the fluorides the radon (1962) and krypton (1963).

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In 2006, researchers at the joint Institute for Nuclear study in Dubna, Russia, announced that oganesson, the next noble gas, had actually been made in 2002 and 2005 in a cyclotron. (Most facets with atomic numbers better than 92—i.e., the transuranium elements—have to it is in made in fragment accelerators.) No physics or chemistry properties that oganesson can be straight determined since only a few atoms that oganesson have been produced.