Helium Facts (Atomic Number 2 or He)

Helium Facts (Atomic Number 2 or He) Helium is nuclear number 2 on the occasional table, with the component image He. It is a lackluster, flavorless gas, most popular for its utilization in filling coasting 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 identified as another ghastly line during a sun based overshadowing, 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 plenitude of helium shifts relying upon topographical area and source, 4He records for about the entirety of the characteristic helium. Properties: Helium is an exceptionally light, idle, dull gas. Helium has the least dissolving purpose of any component. It is the main fluid that can't be set by bringing down the temperature. It stays fluid down to outright zero at customary weights, however can be set by expanding the weight. The particular warmth of helium gas is abnormally high. The thickness of helium fume at the ordinary breaking point is likewise exceptionally high, with the fume growing incredibly when warmed to room temperature. Despite the fact that helium ordinarily has a valence of zero, it has a frail propensity 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 bend welding, as a defensive gas in developing silicon and germanium precious stones and creating 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 counterfeit climate for jumpers and others working under tension. Helium is utilized for filling inflatables and dirigibles. Sources: Except for hydrogen, helium is the most bountiful component known to mankind. It is a significant part in the proton-proton response and the carbon cycle, which represent the vitality of the sun and stars. Helium is extricated from petroleum gas. Truth be told, every single regular ga contains at any rate follow amounts of helium. The combination of hydrogen into helium is the wellsprings of a nuclear bombs vitality. Helium is a breaking down 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 arrangement, 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 organic capacity. Follow measures of the component are found in human blood. While helium is viewed as non-poisonous, 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 chances incorporate frostbite from introduction and blast from extension if the fluid is put away in a fixed compartment. The blend of helium and oxygen (heliox) can cause high-pressure apprehensive disorder, anyway the expansion of nitrogen can cure the issue. Mixes: Because a helium iota has a valence of zero, it has incredibly low synthetic reactivity. Be that as it may, shaky mixes called excimers can be framed when power is applied to the gas. HeH is steady in its ground state, however 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 Common 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) Softening 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 Vanishing Heat (kJ/mol): 0.08 First Ionizing Energy (kJ/mol): 2361.3 Cross section Structure: Hexagonal Cross section Constant (Ã… ): 3.570 Cross section C/A Ratio: 1.633 Precious stone Structure: close-stuffed hexagonal Attractive Ordering: diamagnetic CAS vault 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). Honorable 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