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In the covering atomic model, electrons occupy different energy levels, or shells. The K and also L shells are presented for a neon atom.

Screened indigenous the cell core by intervening electrons, the outer (valence) electron of the atom of the heavier noble gases are organized less firmly and also can be removed (ionized) more easily native the atoms than have the right to the electron of the lighter noble gases. The power required for the removed of one electron is referred to as the first ionization energy. In 1962, while functioning at the college of brothers Columbia, brother chemist Neil Bartlett found that platinum hexafluoride would remove an electron indigenous (oxidize) molecule oxygen to form the salt . The an initial ionization energy of xenon is very close to that of oxygen; hence Bartlett believed that a salt the xenon can be formed similarly. In the very same year, Bartlett established that the is indeed feasible to remove electrons from xenon by chemistry means. He showed that the interaction of PtF6 vapour in the existence of xenon gas at room temperature produced a yellow-orange solid link then formulated together . (This compound is now recognized to be a mixture that , , and PtF5.) soon after the early stage report of this discovery, two various other teams that chemists independently prepared and subsequently report fluorides that xenon—namely, XeF2 and XeF4. These achievements were soon adhered to by the ready of other xenon compounds and of the fluorides of radon (1962) and krypton (1963).

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In 2006, researchers at the share Institute because that Nuclear research in Dubna, Russia, announced that oganesson, the next noble gas, had actually been do in 2002 and 2005 in a cyclotron. (Most elements with atom numbers better than 92—i.e., the transuranium elements—have to it is in made in particle accelerators.) No physical or chemical properties that oganesson have the right to be directly determined because only a couple of atoms that oganesson have actually been produced.