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Template:Infobox hydrogen

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Hydrogen, 1H
A clear tube with blue and purple light emanating from it
Purple glow in hydrogen's plasma state.
Hydrogen
AppearanceColorless gas
Standard atomic weight Ar°(H)
Hydrogen in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
–
↑
H
↓
Li
(none) ← hydrogen → helium
Atomic number (Z)1
Groupgroup 1: hydrogen and alkali metals
Periodperiod 1
Block  s-block
Electron configuration1s1
Electrons per shell1
Physical properties
Phase at STPgas
Melting point(H2) 13.99 K ​(−259.16 °C, ​−434.49 °F)
Boiling point(H2) 20.271 K ​(−252.879 °C, ​−423.182 °F)
Density (at STP)0.08988 g/L
when liquid (at m.p.)0.07 g/cm3 (solid: 0.0763 g/cm3)[3]
when liquid (at b.p.)0.07099 g/cm3
Triple point13.8033 K, ​7.041 kPa
Critical point33.19[4] K, 1.313[4] MPa
Heat of fusion(H2) 0.117 kJ/mol
Heat of vaporization(H2) 0.904 kJ/mol
Molar heat capacity14.418 J/(mol·K) (H)
28.836 J/(mol·K) (H2)
Specific heat capacity14303.571 J/(kg·K) (H)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K)         15 20
Atomic properties
Oxidation statescommon: −1, +1
ElectronegativityPauling scale: 2.20
Ionization energies
  • 1st: 1312.0 kJ/mol
Covalent radius31±5 pm
Van der Waals radius120 pm
Color lines in a spectral range
Spectral lines of hydrogen
Other properties
Natural occurrenceprimordial
Crystal structure ​hexagonal (hP4)
Lattice constantsa = 378.97 pm
c = 618.31 pm (at triple point)[5]
Thermal conductivity0.1805 W/(m⋅K)
Magnetic orderingdiamagnetic[6]
Molar magnetic susceptibility−3.98×10−6 cm3/mol (298 K)[7]
Speed of sound1310 m/s (gas, 27 °C)
CAS Number12385-13-6
1333-74-0 (H2)
History
Namingname means 'water-former' in Greek
Discovery and first isolationHenry Cavendish[8][10][11] (1766)
Named byAntoine Lavoisier[8][9] (1783)
Isotopes of hydrogen
Main isotopes[12] Decay
Isotope abun­dance half-life (t1/2) mode pro­duct
1H 99.9855% stable
2H 0.0115% stable
3H trace 12.32 y β− 3He
Abundance of deuterium is highly variable
File:Symbol category class.svg Category: Hydrogen
| references
child table, as reused in {IB-H}
Main isotopes of hydrogen
Main isotopes[12] Decay
Isotope abun­dance half-life (t1/2) mode pro­duct
1H 99.9855% stable
2H 0.0115% stable
3H trace 12.32 y β− 3He
Abundance of deuterium is highly variable
Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt) caption:

alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
  most stable isotope
File:Notification-icon-Wikidata-logo.svg Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01)
See also {{Index of data sets}} · Cat:data sets (0) · (this table:
)

References

These references will appear in the article, but this list appears only on this page.
  1. ↑ "Standard Atomic Weights: Hydrogen". CIAAW. 2009.
  2. ↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  3. ↑ Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick (2001). Inorganic chemistry. Academic Press. p. 240. ISBN 978-0123526519.
  4. ↑ 4.0 4.1 Smith, Joseph Mauk; Van Ness, Hendrick C.; Abbott, Michael M.; Swihart, Mark Thomas (2017). Introduction to Chemical Engineering Thermodynamics, Eighth Edition. McGraw Hill. p. 665. ISBN 978-1-259-69652-7.
  5. ↑ Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.
  6. ↑ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 978-0-8493-0486-6. Archived from the original (PDF) on 3 March 2011.
  7. ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 978-0-8493-0464-4.
  8. ↑ 8.0 8.1 Miśkowiec, Paweł (April 2023). "Name game: The naming history of the chemical elements—part 1—from antiquity till the end of 18th century". Foundations of Chemistry. 25 (1): 29–51. doi:10.1007/s10698-022-09448-5.
  9. ↑ Stwertka, Albert (1996). A Guide to the Elements. Oxford University Press. pp. 16–21. ISBN 978-0-19-508083-4.
  10. ↑ Emsley, John (2001). Nature's Building Blocks. Oxford: Oxford University Press. pp. 183–191. ISBN 978-0-19-850341-5.
  11. ↑ "Hydrogen". Van Nostrand's Encyclopedia of Chemistry. Wylie-Interscience. 2005. pp. 797–799. ISBN 978-0-471-61525-5.
  12. ↑ 12.0 12.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3) 030001. doi:10.1088/1674-1137/abddae.

Three of these references are named references. They may be cited in the containing articles as

  • <ref name="Nostrand" /> for the source from Van Nostrand's Encyclopedia
  • <ref name="nbb" /> for the source from Nature's Building Blocks
  • <ref name="Stwertka" /> for the source from A Guide to the Elements
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