Nodyn:Infobox hydrogen

- ← hydrogen → heliwm - ↑ H ↓ Li 1H Y Tabl Cyfnodol
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	1, 1, 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) 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 triphlyg	13.8033 K (-259°C), 7.042 kPa
Pwynt critigol	32.97 K, 1.293 MPa
Enthalpi ymdoddiad Gwres o ymdoddi	kJ·mol−1
Enthalpi anweddiad	Cynhwysedd gwres	(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
cyflwr ocsidiad	1, -1 (ocsid amffoterig)
Electronegativity	2.20 (Graddfa Pauling)
egni ïoneiddiadau	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

References

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