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You are watching: The most characteristic property of the noble gases is that they

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

Screened from the nucleus by intervening electrons, the outer (valence) electron of the atom of the more heavier noble gases are organized less firmly and can be eliminated (ionized) much more easily indigenous the atom than can the electron of the lighter noble gases. The power required because that the removal of one electron is dubbed the very first ionization energy. In 1962, while working at the university of british Columbia, british chemist Neil Bartlett found that platinum hexafluoride would remove an electron from (oxidize) molecule oxygen to kind the salt . The an initial ionization power of xenon is really close to that of oxygen; thus Bartlett assumed that a salt that xenon can be developed similarly. In the same year, Bartlett developed that that is indeed possible to remove electrons from xenon by chemical means. He showed that the interaction of PtF6 vapour in the existence of xenon gas in ~ room temperature produced a yellow-orange solid compound then formulated as . (This link is now recognized to it is in a mixture the , , and also PtF5.) quickly after the initial report the this discovery, two various other teams of chemists separately prepared and also subsequently reported fluorides that xenon—namely, XeF2 and XeF4. These accomplishments were soon complied with by the ready of various other xenon compounds and also of the fluorides of radon (1962) and also krypton (1963).

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In 2006, scientists at the share Institute for Nuclear research in Dubna, Russia, announced the oganesson, the following noble gas, had actually been do in 2002 and 2005 in a cyclotron. (Most aspects with atom numbers greater than 92—i.e., the transuranium elements—have to it is in made in bit accelerators.) No physical or chemistry properties of oganesson deserve to be directly determined because only a few atoms the oganesson have been produced.