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This is an accepted version of this page This is the latest accepted revision, reviewed on 15 January 2025. Chemical element with atomic number 10 (Ne) This article is about the chemical element. For other uses, see Neon (disambiguation). Chemical element with atomic number 10 (Ne) Neon, 10 Ne Neon Appearance colorless gas exhibiting an orange-red glow when placed in an electric field Standard ...
Neon in an electrical discharge tube. Neon has a density of 9.002 × 10 −4 g/cm 3, liquifies at −245.95 °C, and solidifies at −248.45 °C. It has the narrowest liquid range of any element and, in liquid form, has over 40 times the refrigerating capacity of liquid helium and three times that of liquid hydrogen.
A helium neon excimer can be found in a mixed plasma or helium and neon. [50] Some other excimers can be found in solid neon, including Ne + 2 O − which has a luminescence peaking around 11.65 eV, or Ne + 2 F − luminescing around 10.16–10.37 eV and 8.55 eV. [51]
As of 2008, endohedral complexes with helium, neon, argon, krypton, and xenon have been created. [64] These compounds have found use in the study of the structure and reactivity of fullerenes by means of the nuclear magnetic resonance of the noble gas atom. [65] Bonding in XeF 2 according to the 3-center-4-electron bond model
The only metal having an ionisation energy higher than some nonmetals (sulfur and selenium) is mercury. [citation needed] Mercury and its compounds have a reputation for toxicity but on a scale of 1 to 10, dimethylmercury ((CH 3) 2 Hg) (abbr. DMM), a volatile colourless liquid, has been described as a 15. It is so dangerous that scientists have ...
The U.S. Food and Drug Administration (FDA) now classifies eggs as a “healthy, nutrient-dense" food, according to a new proposed rule. Registered dietitians react to the change.
You might start the year hoping to lose a few pounds or get a few more steps in, but it's also a good time to take stock of your home's emergency readiness, including fire safety.
Demarçay found spectral lines of a new element in Lecoq's samarium, and separated this element several years later. [149] 36 Krypton: 1898 W. Ramsay and W. Travers: 1898 W. Ramsay and W. Travers: On May 30, 1898, Ramsay separated a noble gas from liquid argon by difference in boiling point. [150] 10 Neon: 1898 W. Ramsay and W. Travers 1898