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- Name : Neon
- Symbol : Ne
- Atomic # : 10
- Atom weight: 20.179
- Melting P. : -248.67
- Boiling P. : -246.048
- Oxidation : 0
- Pronounced : NEE-on
- From : Greek neos, "new"
- Identified : Sir William Ramsay and Morris W. Travers in 1898.
- Appearance : Colorless, odorless, tasteless gas
- Note : Fourth most abundant element in the known universe.
-
- [Properties]
-
- Neon is classified as a noble gas, a group of gasses that are noted for
- being relatively inert. Neon is located in Group O on the periodic chart,
- between helium (He) and argon (Ar). Because their electron orbits are
- completely filled, the noble gasses are very stable and do not form
- compounds with other elements under normal conditions. In fact, it is
- this level of stability that other elements attempt to achieve when they
- combine to form compounds.
- We have known since the early 1960s that the noble gasses, including
- neon, are not totally inert as was once thought. The three heavier noble
- gasses, krypton (Kr), xenon (Xe), and radon (Rn), can form a few stable
- compounds. There are no known stable compounds for helium (He), neon,
- and argon (Ar); however, ionized versions of these atoms can combine with
- a proton, or hydrogen ion, to form a two-element ion. Electrical
- discharges in confined mixtures of helium and neon, for example, have
- been found to produce NeH+.
- Neon is monatomic. Unlike some of the other gasses, including oxygen,
- nitrogen, and hydrogen, a molecule of neon gas is made up of one atom.
- Whereas an oxygen molecule is portrayed as a diatomic molecule, the
- symbol for a neon gas is simply Ne.
-