Hydrogen

henry\n1H\n-\nâ†'\nH\nâ†"\nLi\n\n oscillating table\n\n- ← total heat â†' atomic upshot 2\n\nAppearance\ncolorless vaunt\n\nPurple glow in its plasma state\n\n ghostlike lines of total heat\nGeneral properties\nName, symbolisation, subdue heat content, H, 1\nPronunciation /ˈhaɪdrÉ™dÊ'É™n/ HY-drÉ™-jÉ™n[1]\n piece category nonmetal\nGroup, period, encumber 1, 1, s\nStandard atomic weight 1.008(1)\nElectron manikin 1s1\n1\n\nHistory\n breakthrough Henry Cavendish[2][3] (1766)\nNamed by Antoine Lavoisier[4] (1783)\n somatogenic properties\nColor colorless\n con changeation gas\nDensity (0 °C, 101.325 kPa)\n0.08988 g/L\nLiquid assiduousness at m.p. 0.07 (0.0763 solid)[5] g·cmâˆ'3\nLiquid absorption at b.p. 0.07099 g·cmâˆ'3\nMelting rate 14.01 K, -259.14 °C, -434.45 °F\nBoiling quest 20.28 K, -252.87 °C, -423.17 °F\nTriple efflorescence 13.8033 K (-259°C), 7.042 kPa\nCritical psyche 32.97 K, 1.293 MPa\nHeat of fusion (H2) 0.117 kJ· jettyâˆ'1\nHeat of vapour (H2) 0.904 kJ·molâˆ'1\n bomber heat capacity (H2) 28.836 J·molâˆ'1·Kâˆ'1\nVapor closet\nP (Pa) 1 10 hundred 1 k 10 k 100 k\nat T (K) 15 20\n\n atomic properties\nOxidation states 1, -1\n(amphoteric oxide)\nElectronegativity 2.20 (Pauling scale)\nionisation energies 1st: 1312.0 kJ·molâˆ'1\nCovalent radius 31±5 pm\nforefront der Waals radius 120 pm\nMiscellanea\nCrystal coordinate hexagonal\nMagnetic rules of order diamagnetic[6]\nThermal conductivity 0.1805 W·mâˆ'1·Kâˆ'1\nSpeed of kick the bucket (gas, 27 °C) 1310 m·sâˆ'1\nCAS registry outlet 1333-74-0\nMost unchanging isotopes\n principal(prenominal) article: Isotopes of hydrogen\niso NA half-life DM DE (MeV) DP\n1H 99.985% 1H is stable with 0 neutrons\n2H 0.015% 2H is stable with 1 neutron\n3H trace 12.32 y βâˆ' 0.01861 3He\n\nv ·t ·e· r\n\n hydrogen is a chemical substance element with symbol H and atomic number 1. With an average atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen is the l ightest element and its monatomic form (H1) is the most abundant chemical substance, constituting roughly 75% of the Universes baryonic mass.[7] Non-remnant stars atomic number 18 mainly composed of hydrogen in its plasma state.\n\nAt standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular convening H2. Naturally occurring atomic hydrogen is rare on public because hydrogen readily forms covalent compounds with most elements and is present in the water molecule and in most organic compounds. Hydrogen plays a particularly serious role in acid-base chemical science with many reactions exchanging protons between water-soluble molecules.\n\nIn ionic compounds, it usher out take a detrimental charge (an anion known as a hydride and written as Hâˆ'), or as a positively charged...If you emergency to get a climb essay, order it on our website:

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