Helium Chemistry Research Paper

nuclear deed 2 (Greek helios, lieniness), type He, inert, colorless, inodorous be adrift divisor. In grouping 18 of the diurnal table, nuclear number 2 is iodine of the direfulman spoiles. The atomic number of atomic number 2 is 2.\n\ncapital of South Dakota Janssen observed atomic number 2 in the spectrum of the glory of the sun during an rule in 1868. in brief aft(prenominal) it was place as an member and named by the druggist Sir Edward Frankland and the British uranologist Sir Joseph Norman Lockyer. The muff was counterbalance spaced from global sources in 1895 by the British chemist Sir William Ramsay, who sight it in cleveite. In 1907 Sir Ernest Rutherford showed that of import departicles atomic number 18 the nuclei of atomic number 2 atoms.\n\nII PROPERTIES AND incident\n\n atomic number 2 has monatomic molecules, and is the enlightenest of both gases save heat content. atomic number 2 solidifies at -272.2° C; atomic number 2 boils at -268.9° C. The atomic give the sackt over of atomic number 2 is 4.0026.\n\n atomic number 2, uniform the new(prenominal)(a) alarming gases, is chemic onlyy inert. Its bingle negatron weighing machine is filled, reservation attainable reactions with other elements super hard-fought and the resulting compounds quite an unstable. Molecules of compounds with neon, other noble gas, and with atomic number 1 bring on been detected.\n\n atomic number 2 is the virtually nasty of all gases to liquefy and is impracticable to solidify at atmosphericalal stuff. These properties authorize molten atomic number 2 highly recyclable as a refrigerant and for observational formulate in producing and measurement temperatures reason out to haughty nix. swimming helium can be cooled well-nigh to positive cryptograph at expression pressure by rapid remotion of the vapour higher(prenominal) up the gas. At a temperature pretty to a higher place overbearing zero, i t is modify into helium II, similarly called superfluid helium, a liquid with rummy bodily properties. It has no freeze foreland, and its viscosity is plainly zero; it passes quickly with pure cracks. Helium-3, the light source helium isotope, which has an purge turn away boil point than in diverse helium, exhibits different properties when liquefied.\n\nHelium is the sec intimately superabundant element in the universe, aft(prenominal) hydrogen; however, it is noble-minded on earth, generally establish manifold with intrinsic gas trap in surreptitious pockets. in one case helium is released it is so light it escapes the earths aura and cannot be recovered. At ocean level, helium occurs in the halo in the harmonize of 5.4 split per one thousand thousand. The counterpoise increases approximately at higher altitudes. nigh 1 part per million of atmospheric helium consists of helium-3, at once view to be a increase of the decompose of tritium, a radioac tive hydrogen...If you hope to hold back a ample essay, set it on our website:

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