Helium Facts (Atomic Number 2 or He)

Helium Facts (Atomic Number 2 or He) Helium is nuclear number 2 on the intermittent table, with the component image He. It is a lackluster, flavorless gas, most popular for its utilization in filling drifting inflatables. Here is an assortment of realities about this lightweight, fascinating component: Helium Element Facts Helium Atomic Number: 2 Helium Symbol: He Helium Atomic Weight: 4.002602(2) Helium Discovery: Janssen, 1868, a few sources state Sir William Ramsey, Nils Langet, P.T. Cleve 1895 Helium Electron Configuration: 1s2 Word Origin: Greek: helios, sun. Helium was first distinguished as another ghostly line during a sun oriented obscuration, so it is named for the Greek Titan of the Sun. Isotopes: 9 isotopes of helium are known. Just two isotopes are steady: helium-3 and helium-4. While the isotopic wealth of helium fluctuates relying upon land area and source, 4He records for about the entirety of the regular helium. Properties: Helium is an exceptionally light, dormant, dull gas. Helium has the least softening purpose of any component. It is the main fluid that can't be hardened by bringing down the temperature. It stays fluid down to supreme zero at common weights, yet can be hardened by expanding the weight. The particular warmth of helium gas is uncommonly high. The thickness of helium fume at the typical breaking point is likewise extremely high, with the fume growing extraordinarily when warmed to room temperature. Despite the fact that helium typically has a valence of zero, it has a feeble inclination to join with certain different components. Utilizations: Helium is generally utilized in cryogenic examination since its breaking point is close to supreme zero. It is utilized in the investigation of superconductivity, as an inactive gas shield for curve welding, as a defensive gas in developing silicon and germanium gems and delivering titanium and zirconium, for compelling fluid fuel rockets, for use in attractive reverberation imaging (MRI), as a cooling mode for atomic reactors, and as a gas for supersonic air streams. A blend of helium and oxygen is utilized as a fake air for jumpers and others working under tension. Helium is utilized for filling inflatables and airships. Sources: Except for hydrogen, helium is the most bountiful component known to mankind. It is a significant segment in the proton-proton response and the carbon cycle, which represent the vitality of the sun and stars. Helium is separated from gaseous petrol. Truth be told, every single regular ga contains in any event follow amounts of helium. The combination of hydrogen into helium is the wellsprings of a nuclear bombs vitality. Helium is a deterioration result of radioactive substances, so it is found in minerals of uranium, radium, and different components. The vast majority of Earths helium goes back to the planets development, albeit a limited quantity tumbles to Earth inside inestimable residue and some is delivered by means of beta rot of tritium. Wellbeing Effects: Helium serves no natural capacity. Follow measures of the component are found in human blood. While helium is viewed as non-harmful, it dislodges oxygen so breathing in it can prompt hypoxia or suffocation. Fatalities from breathing in helium are uncommon. Fluid helium is a cryogenic fluid, so hazards incorporate frostbite from introduction and blast from development if the fluid is put away in a fixed compartment. The blend of helium and oxygen (heliox) can cause high-pressure apprehensive condition, anyway the expansion of nitrogen can cure the issue. Mixes: Because a helium particle has a valence of zero, it has amazingly low compound reactivity. Be that as it may, shaky mixes called excimers can be shaped when power is applied to the gas. HeH is steady in its ground state, yet it is the most grounded known Bronsted corrosive, fit for protonating any species it experiences. Van der Waals mixes structure with cryogenic helium gas, for example, LiHe. Component Classification: Noble Gas or Inert Gas Normal Phase: gas Thickness (g/cc): 0.1786 g/L (0  °C, 101.325 kPa) Fluid Density (g/cc): 0.125 g/mL (at its breaking point) Dissolving Point ( °K): 0.95 Breaking point ( °K): 4.216 Basic Point: 5.19 K, 0.227 MPa Nuclear Volume (cc/mol): 31.8 Ionic Radius: 93 Explicit Heat (20 °C J/g mol): 5.188 Warmth of Fusion: 0.0138 kJ/mol Dissipation Heat (kJ/mol): 0.08 First Ionizing Energy (kJ/mol): 2361.3 Grid Structure: Hexagonal Grid Constant (Ã… ): 3.570 Grid C/A Ratio: 1.633 Gem Structure: close-pressed hexagonal Attractive Ordering: diamagnetic CAS library number: 7440-59-7 Test: Ready to test your helium realities information? Take the Helium Facts Quiz. References Meija, J.; et al. (2016). Nuclear loads of the components 2013 (IUPAC Technical Report). Unadulterated and Applied Chemistry. 88 (3): 265â€91. doi:10.1515/pac-2015-0305Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). Respectable Gases. Kirk Othmer Encyclopedia of Chemical Technology. Wiley. pp. 343â€383. doi:10.1002/0471238961.0701190508230114.a01.Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4. Come back to the Periodic Table