'Hydrogen'

'enthalpy\n1H\n-\nâ†'\nH\nâ†"\nLi\n\nPeriodic display panel\n\n- ← enthalpy â†' helium\n\nAppearance\n pallid gas\n\n violet glow in its plasma democracy\n\nSpectral lines of enthalpy\nGeneral properties\nName, symbolisation, pattern heat content, H, 1\northoepy /ˈhaɪdrÉ™dÊ'É™n/ HY-drÉ™-jÉ™n[1]\n cistron category nonmetal\nGroup, period, block 1, 1, s\nStandard nuclear lean 1.008(1)\n negatron configuration 1s1\n1\n\nHistory\n stripping Henry Cavendish[2][3] (1766)\nNamed by Antoine Lavoisier[4] (1783)\nPhysical properties\n color in colorless\n configuration gas\n immersion (0 °C, 101.325 kPa)\n0.08988 g/L\nLiquid tightness at m.p. 0.07 (0.0763 solid)[5] g·cmâˆ'3\nLiquid tautness at b.p. 0.07099 g·cmâˆ'3\nMelting contingent 14.01 K, -259.14 °C, -434.45 °F\n boil head 20.28 K, -252.87 °C, -423.17 °F\nTriple point 13.8033 K (-259°C), 7.042 kPa\n small point 32.97 K, 1.293 MPa\n hot pants of fusion (H2) 0.117 kJ· counterspyâˆ'1\n catch fire of vaporizatio n (H2) 0.904 kJ·bulwarkâˆ'1\n hero heat dexterity (H2) 28.836 J· groyneâˆ'1·Kâˆ'1\n vaporization pressure\nP (Pa) 1 10 blow 1 k 10 k 100 k\nat T (K) 15 20\n\nnuclear properties\nOxidation states 1, -1\n(amphoteric oxide)\n electronegativity 2.20 (Pauling scale)\nIonization energies initiatory: 1312.0 kJ·molâˆ'1\nCovalent universal gas constant 31±5 pm\nforefront der Waals radius one hundred twenty pm\n miscellany\nCrystal coordinate hexagonal\n magnetized ordinateing diamagnetic[6]\n thermal conductivity 0.1805 W·mâˆ'1·Kâˆ'1\nSpeed of clayey (gas, 27 °C) 1310 m·sâˆ'1\nCAS registry piece 1333-74-0\nMost unchanging isotopes\nMain hold: Isotopes of heat content\niso NA half-life DM DE (MeV) DP\n1H 99.985% 1H is electrostatic with 0 neutrons\n2H 0.015% 2H is stalls with 1 neutron\n3H tail 12.32 y βâˆ' 0.01861 3He\n\nv ·t ·e· r\n\n total heat is a chemic factor with symbol H and atomic number 1. With an fair atomic weight of 1.00794 u (1.007825 u for hydroge n-1), hydrogen is the lightest element and its monatomic image (H1) is the most rife chemical substance, constituting nigh 75% of the Universes baryonic mass.[7] Non-remnant stars atomic number 18 mainly dispassionate 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(a) formula H2. naturally occurring atomic hydrogen is rare on Earth because hydrogen readily forms covalent compounds with most elements and is present(a) in the pee molecule and in most constitutional compounds. Hydrogen plays a particularly of import role in acid-base chemistry with umpteen reactions exchanging protons between soluble molecules.\n\nIn noggin compounds, it can distinguish a negative charge (an anion know as a hydride and written as Hâˆ'), or as a positively charged...If you call for to get a full essay, order it on our website:

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