Nodyn:Infobox hydrogen

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Neidio i: llywio, chwilio
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H

Li
Ymddangosiad
Nwy di-liw er fod iddo rhyw wawr ysgafn, biws pan fo'n blasma


Llinellau sbectral hydrogen
Nodweddion cyffredinol
Enw, symbol, rhif hydrogen, H, 1
Teulu'r elfennau anfetel
Grŵp, cyfnod, bloc 11, s
Rhif atomig 1.00794(7)
Patrwm yr Electronnau 1s1
Electronnau / cragen 1 (Image)
Nodweddion ffisegol
Lliw di-liw
Stâd nwy
Dwysedd (0 °C, 101.325 kPa)
0.08988 g/L
Dwysedd hylif / Ymdoddbwynt 0.07 (0.0763 solid)[1] g·cm−3
Dwysedd hylif / Ymdoddbwynt 0.07099 g·cm−3
Ymdoddbwynt 14.01 K, -259.14 °C, -434.45 °F
Berwbwynt 20.28 K, -252.87 °C, -423.17 °F
Pwynt trifflyg 13.8033 K (-259°C), 7.042 kPa
Critical point 32.97 K, 1.293 MPa
Enthalpy of fusion

Heat of fusion

kJ·mol−1
Enthalpy of vaporization Molar heat capacity (H2) 28.836 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 15 20
Nodweddion Atomig
Oxidation states 1, -1
(ocsid amffoterig)
Electronegativity 2.20 (Pauling scale)
Ionization energies 1st: 1312.0 kJ·mol−1
Radiws cofalent 31±5 pm
Radiws Van der Waals 120 pm
Amrywiol
Strwythyr y crisal hecsagonal
Magnetic ordering diamagnetic
Dargludiad Thermal 0.1805 W·m−1·K−1
Cyflymder sain (gas, 27 °C) 1310 m·s−1
CAS registry number 1333-74-0
Most stable isotopes
Main article: Isotopes of hydrogen
iso NA half-life DM DE (MeV) DP
1H 99.985% 1H is stable with 0 neutron
2H 0.015% 2H is stable with 1 neutrons
3H trace 12.32 y β 0.01861 3He

· r

References

  1. [http://books.google.com/books?id=vEwj1WZKThEC&pg=PA240%7Ctudalen=240%7Cteitl=Inorganic chemistry|author=Wiberg, Egon; Wiberg, Nils; Holleman, Arnold Frederick|cyhoeddwyd=Academic Press|blwyddyn=2001|isbn=0123526515}}