Devnydhyer:DavydhT/Kyst Tewes/Elvennow/Infobox element

Hydrogen, ₁H
	<img alt="Skantlyn:Infobox element/symbol-to-top-image/alt" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Hydrogen_discharge_tube.jpg/220px-Hydrogen_discharge_tube.jpg" decoding="async" width="220" height="73" class="mw-file-element" data-file-width="3000" data-file-height="1000"> Skantlyn:Infobox element/symbol-to-top-image/caption
Hydrogen
Appearance	colorless gas
Standard atomic weightSkantlyn:Nobold	[[[:Skantlyn:Val]], Skantlyn:Val] conventional: Skantlyn:Val
Mass number	H:
Hydrogen in the periodic table
Skantlyn:Periodic table (32 columns, micro)	–; ↑; H; ↓; Li
	– ← hydrogen → helium
Skantlyn:Nowrap	1
Group	1: H and alkali metals
Period	period 1
Block	s-block
Element category	H:#x20;>#e8e8e8
Electron configuration	1s1
Electrons per shell	1
Physical properties
Phase Skantlyn:Nobold	H: Skantlyn:!((GasSkantlyn:))!
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)
when liquid (at b.p.)	0.07099 g/cm3
Triple point	13.8033 K, 7.041 kPa
Critical point	32.938 K, 1.2858 MPa
Heat of fusion	(H2) 0.117 kJ/mol
[[Enthalpy of vaporization\|Heat of Skantlyn:Engvar]]	(H2) 0.904 kJ/mol
Molar heat capacity	(H2) 28.836 J/(mol·K)
Atomic properties
Oxidation states	Skantlyn:Resize, Skantlyn:Resize (an amphoteric oxide)
Electronegativity	Pauling scale: 2.20
[[Ionization energy\|Skantlyn:Engvar energies]]	1st: 1312.0 kJ/mol ; ;
Covalent radius	31±5 pm
Van der Waals radius	120 pm
	<img alt="Color lines in a spectral range" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/87/Hydrogen_spectrum_visible.png/240px-Hydrogen_spectrum_visible.png" decoding="async" width="240" height="41" class="mw-file-element" data-file-width="7430" data-file-height="1280"> Color lines in a spectral rangeSkantlyn:Strong
Other properties
Natural occurrence	H: Primordial-wl>Skantlyn:!((Primordial nuclide\|PrimordialSkantlyn:))!
Crystal structure	hexagonal <img alt="Hexagonal crystal structure for hydrogen" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/50px-Hexagonal.svg.png" decoding="async" width="50" height="52" class="mw-file-element" data-file-width="295" data-file-height="304">
Speed of sound	1310 m/s (gas, 27 °C)
Thermal conductivity	0.1805 W/(m·K)
Magnetic ordering	diamagnetic
Magnetic susceptibility	−3.98·10−6 cm3/mol (298 K)
CAS Number	12385-13-6 ; 1333-74-0 (H2)
History
Discovery	Henry CavendishSkantlyn:Nowrap
Named by	Antoine LavoisierSkantlyn:Nowrap
Main isotopes of hydrogen
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Arbrov Infobox element

Skantlyn:Short description

Skantlyn:Check temperatures

Skantlyn:Check temperatures Skantlyn:Infobox element/element navigation Skantlyn:Template reference list 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

↑ Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick (2001). Inorganic chemistry. Academic Press. p. 240. ISBN 978-0123526519.
↑ 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.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 978-0-8493-0464-4.
↑ "Hydrogen". Van Nostrand's Encyclopedia of Chemistry. Wylie-Interscience. 2005. pp. 797–799. ISBN 978-0-471-61525-5.
↑ Emsley, John (2001). Nature's Building Blocks. Oxford: Oxford University Press. pp. 183–191. ISBN 978-0-19-850341-5.
↑ Stwertka, Albert (1996). A Guide to the Elements. Oxford University Press. pp. 16–21. ISBN 978-0-19-508083-4.

[1] Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick (2001). Inorganic chemistry. Academic Press. p. 240. ISBN 978-0123526519.

[2] 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.

[3] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 978-0-8493-0464-4.

[Nostrand-4] "Hydrogen". Van Nostrand's Encyclopedia of Chemistry. Wylie-Interscience. 2005. pp. 797–799. ISBN 978-0-471-61525-5.

[nbb-5] Emsley, John (2001). Nature's Building Blocks. Oxford: Oxford University Press. pp. 183–191. ISBN 978-0-19-850341-5.

[Stwertka-6] Stwertka, Albert (1996). A Guide to the Elements. Oxford University Press. pp. 16–21. ISBN 978-0-19-508083-4.

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