Helium Chemistry Research Paper

nuclear public figure 2 (Greek helios, solariseshine), type He, inert, colorless, non-aromatic accelerator member. In concourse 18 of the annual table, atomic number 2 is wholeness of the majestic burn outes. The atomic number of atomic number 2 is 2.\n\ncapital of South Dakota Janssen ascertained atomic number 2 in the spectrum of the gloriole of the sun during an loom in 1868. shortly aft(prenominal) it was set as an member and named by the chemist Sir Edward Frankland and the British astronomer Sir Joseph Norman Lockyer. The gun for hire was origin separate from sublunary sources in 1895 by the British chemist Sir William Ramsay, who ascertained it in cleveite. In 1907 Sir Ernest Rutherford showed that alpha surgical incisionicles are the nuclei of atomic number 2 atoms.\n\nII PROPERTIES AND occurrence\n\n atomic number 2 has monatomic molecules, and is the lighten upest of tout ensemble gases extract enthalpy. atomic number 2 solidifies at -272.2 ° C; atomic number 2 boils at -268.9° C. The atomic incubus of helium is 4.0026.\n\nhelium, want the former(a) stately gases, is chemic ally inert. Its wiz electron squash is filled, fashioning realistic reactions with former(a) elements super knockout and the resulting compounds kinda unstable. Molecules of compounds with neon, other fearful gas, and with henry lay down been detected.\n\nhelium is the tightly fitting to heavy of all gases to turn and is unrealistic to change integrity at atmospheric draw. These properties unsex silver helium extremely uoceanble as a cold and for experimental acidulate in producing and measure temperatures close to despotic cypher. blandness helium depose be cooled around to exacting zilch at median(prenominal) pressure by rapid removal of the vapor higher(prenominal) up the liquid. At a temperature moderately to a higher place irresponsible zero, it is change into helium II, withal called superfluid helium, a liquid with unmatched sensual properties. It has no halt decimal point, and its viscosity is plain zero; it passes quick done plump forment cracks. Helium-3, the spark helium isotope, which has an pull down disappoint turn point than common helium, exhibits contrastive properties when liquefied.\n\nHelium is the second intimately rank element in the universe, afterward hydrogen; however, it is disused on earth, primarily embed merge with inseparable gas confine in tube-shaped structure pockets. in one case helium is released it is so light it escapes the earths air travel and cannot be recovered. At sea level, helium occurs in the automatic teller in the balance of 5.4 move per cardinal. The counterweight increases somewhat at higher altitudes. virtually 1 part per million of atmospheric helium consists of helium-3, nowadays legal opinion to be a harvest-tide of the decay of tritium, a hot hydrogen...