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In the covering atomic model, electron occupy various energy levels, or shells. The K and L shells are shown for a neon atom.
Screened from the nucleus by intervening electrons, the outer (valence) electrons of the atom of the heavier noble gases are held less firmly and can be removed (ionized) an ext easily from the atoms than have the right to the electrons of the lighter noble gases. The energy required because that the removal of one electron is dubbed the very first ionization energy. In 1962, while working at the college of british Columbia, brother chemist Neil Bartlett uncovered that platinum hexafluoride would remove an electron indigenous (oxidize) molecular oxygen to form the salt
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In 2006, researchers at the share Institute because that Nuclear research in Dubna, Russia, announced that oganesson, the following noble gas, had been do in 2002 and also 2005 in a cyclotron. (Most elements with atom numbers greater than 92—i.e., the transuranium elements—have to it is in made in bit accelerators.) No physical or chemical properties of oganesson deserve to be straight determined since only a couple of atoms that oganesson have been produced.