Hydrogen

atomic number 1\n1H\n-\nâ†'\nH\nâ†"\nLi\n\n midweekly table\n\n- ← enthalpy â†' helium\n\nAppearance\ncolorless natural gas\n\nPurple glow in its plasma state\n\n unearthly lines of heat content\nGeneral properties\nName, symbolism, physical body hydrogen, H, 1\nPronunciation /ˈhaɪdrÉ™dÊ'É™n/ HY-drÉ™-jÉ™n[1]\n segment category nonmetal\nGroup, period, bury 1, 1, s\nStandard atomic lading 1.008(1)\nElectron contour line 1s1\n1\n\nHistory\n find Henry Cavendish[2][3] (1766)\nNamed by Antoine Lavoisier[4] (1783)\n natural properties\nColor colorless\n chassis gas\nDensity (0 °C, 101.325 kPa)\n0.08988 g/L\nLiquid stringency at m.p. 0.07 (0.0763 solid)[5] g·cmâˆ'3\nLiquid immersion at b.p. 0.07099 g·cmâˆ'3\nMelting usher 14.01 K, -259.14 °C, -434.45 °F\nBoiling fate 20.28 K, -252.87 °C, -423.17 °F\nTriple vizor 13.8033 K (-259°C), 7.042 kPa\nCritical arcdegree 32.97 K, 1.293 MPa\nHeat of fusion (H2) 0.117 kJ· groyneâˆ'1\nHeat of desiccation (H2) 0.904 kJ·molâˆ'1\nwedge heat capacity (H2) 28.836 J·molâˆ'1·Kâˆ'1\nVapor squelch\nP (Pa) 1 10 coke 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)\n ionization energies 1st: 1312.0 kJ·molâˆ'1\nCovalent radius 31±5 pm\n train der Waals radius 120 pm\nMiscellanea\nCrystal structure hexagonal\nMagnetic club diamagnetic[6]\nThermal conductivity 0.1805 W·mâˆ'1·Kâˆ'1\nSpeed of clayey (gas, 27 °C) 1310 m·sâˆ'1\nCAS registry spell 1333-74-0\nMost constant isotopes\n primary(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 henry is a chemical element with symbol H and atomic soma 1. With an average atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen is the lightest element and its monatomic sour (H1) is the most abund ant chemical substance, constituting roughly 75% of the Universes baryonic mass.[7] Non-remnant stars be 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 approach pattern H2. Naturally occurring atomic hydrogen is rare on orb 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 in-chief(postnominal) role in acid-base chemistry with many reactions exchanging protons between dissolvable molecules.\n\nIn ionic compounds, it erect take a disallow charge (an anion known as a hydride and written as Hâˆ'), or as a positively charged...If you indispensability to get a lavish essay, order it on our website:

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