Hidrogen (H)

elfen gemegol gyda'r symbol H a'r rhif atomig 1

Atomic Number	1
Atomic Weight	1.008
Rhif màs	1

Group	1
Period	1
Block	s

Proton	1 p⁺
Niwtron	0 n⁰
Electron	1 e^-

Nodwedd Ffisegol

Atomic Radius	25 pm 154 pm
molar volume	14.1 cm³/mol
covalent radius	32 pm 31 pm
Metallic Radius	78 pm
ionic radius	-38 pm -18 pm
Crystal Radius	-24 pm -4 pm
Van der Waals radius	120 pm 319.5 pm 110 pm 162 pm 110 pm 288.6 pm
density	0.000082 g/cm³

Nodwedd Gemegol

egni

proton affinity
electron affinity	0.754195 eV/particle
ionization energy	13.598434005136 eV/particle
enthalpy of vaporization	0.904 kJ/mol
enthalpy of fusion	0.117 kJ/mol
standard enthalpy of formation	217.998 kJ/mol
Electron

plisgyn yr electron	1

valence electron	1 ⓘ

trefn yr electronnau	1s¹ⓘ

Cyflwr ocsidiad	-1, 1
Electronegatifedd	13.61 eV/particle 0.2638 2.2
Electrophilicity Index	2.00476999140139 eV/particle
cyflwr sylfaenol mater

cyflwr mater	Gas
gaseous state of matter	Diatomic
Boiling Point	20.271 K
Melting Point	13.99 K
critical pressure	1.2858 MPa
critical temperature	32.938 K
triple point	13.8033 K 7.041 kPa
appearance
lliw	Colorless #ffffff #ffffff #f2f2f2
appearance	colorless gas
Mynegrif plygiant	1.000132
nodwedd ffisegol gwrthrych
Thermal Conductivity	0.1815 W/(m K)
thermal expansion
molar heat capacity	28.836 J/(mol K)
Specific Heat Capacity	14.304 J/(g⋅K)
heat capacity ratio	7/5
electrical properties
type
dargludedd trydanol
Gwrthedd
superconductivity
magnetism
type	diamagnetic
magnetic susceptibility (Mass)	-0.0000000248 m³/Kg
magnetic susceptibility (Molar)	-0.00000000004999 m³/mol
magnetic susceptibility (Volume)	-0.00000000223
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	3.75 Å
Lattice Angles	π/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound	1,270 m/s
classification
Category	Other nonmetals, Nonmetals
CAS Group	IA
IUPAC Group	IA
Glawe Number	103
Mendeleev Number	105
Pettifor Number	103
Geochemical Class	volatile
Goldschmidt classification	atmophile

other

Gas Basicity
polarizability	4.50711 ± 0.00003 a₀
C6 Dispersion Coefficient	6.499026705 a₀ 6.51 a₀
allotrope	Dihydrogen
Neutron cross section	0.332
Neutron Mass Absorption	0.011
quantum number	2S1/2
space group	194 (P63/mmc)

Isotopes of Hydrogen

Stable Isotopes	2
Unstable Isotopes	5
Natural Isotopes	2

¹H

Rhif màs	1
neutron number	0
Relative Atomic Mass	1.007825031898 ± 0.000000000014 Da
g-factor	5.585694702 ± 0.000000018
natural abundance	99.9855 ± 0.0078
Dadfeilio ymbelydrol	stable isotope
Hanner oes	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1920
parity	+

²D

Rhif màs	2
neutron number	1
Relative Atomic Mass	2.014101777844 ± 0.000000000015 Da
g-factor	0.857438231 ± 0.000000005
natural abundance	0.0145 ± 0.0078
Dadfeilio ymbelydrol	stable isotope
Hanner oes	Not Radioactive ☢️
spin	1
nuclear quadrupole moment
dyddiad darganfod	1932
parity	+

³T

Rhif màs	3
neutron number	2
Relative Atomic Mass	3.01604928132 ± 0.00000000008 Da
g-factor	5.95792492 ± 0.000000028
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	12.32 ± 0.02 y
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1934
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

⁴H

Rhif màs	4
neutron number	3
Relative Atomic Mass	4.026431867 ± 0.000107354 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	139 ± 10 ys
spin	2
nuclear quadrupole moment
dyddiad darganfod	1981
parity	-

decay mode	intensity
n (neutron emission)	100%

⁵H

Rhif màs	5
neutron number	4
Relative Atomic Mass	5.035311492 ± 0.00009602 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	86 ± 6 ys
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1987
parity	+

decay mode	intensity
2n (2-neutron emission)	100%

⁶H

Rhif màs	6
neutron number	5
Relative Atomic Mass	6.044955437 ± 0.000272816 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	294 ± 67 ys
spin	2
nuclear quadrupole moment
dyddiad darganfod	1984
parity	-

decay mode	intensity
n (neutron emission)
3n (3-neutron emission)

⁷H

Rhif màs	7
neutron number	6
Relative Atomic Mass	7.052749 ± 0.001078 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	652 ± 558 ys
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	2003
parity	+

decay mode	intensity
2n (2-neutron emission)

hanes

darganfyddwr neu ddyfeisiwr	Henry Cavendish
man darganfod	England
dyddiad darganfod	1766
geirdarddiad	Greek: hydro (water) and genes (generate)
ynganiad	HI-dreh-jen (Saesneg)

source

Abundance
Abundance in Earth's crust	1,400 mg/kg
natural abundance (cefnfor)	108,000 mg/L
natural abundance (corff dynol)	10 %
natural abundance (Awyrfaen)	2.4 %
natural abundance (Haul)	75 %
Abundance in Universe	75 %

Nuclear Screening Constants

Hidrogen on ChemicalAid

Australian Educational Vocabulary ID	scot/3530
Brockhaus Enzyklopädie online ID	wasserstoff
Den Store Danske ID	hydrogen
English Vikidia ID	Hydrogen
French Vikidia ID	Hydrogène
GND	4064784-5
Golden ID	Hydrogen-B6Z9
Great Russian Encyclopedia Online ID	1922207
ID NALT	32806
Italian Vikidia ID	Idrogeno
Krugosvet article	nauka_i_tehnika/himiya/VODOROD.html
Namuwiki ID	수소
National Library of Israel J9U ID	987007533741005171
NicoNicoPedia ID	水素
OmegaWiki Defined Meaning	1823
Online PWN Encyclopedia ID	3997333
OpenAlex ID	C3019042630
OpenAlex ID	C2993084020
OpenAlex ID	C512968161
Rhif Cofrestru CAS	12385-13-6
Römpp online ID	RD-23-00368
Spanish Vikidia ID	Hidrógeno
Store norske leksikon ID	hydrogen
UK Archival Thesaurus ID	f2/mt225/4347/1765
UNESCO Thesaurus ID	concept4989
USGS Thesaurus ID	1476
WordNet 3.1 Synset ID	14664612-n
dynodwr AAT	300379581
dynodwr BNE	XX527582
dynodwr BnF	120632855
dynodwr Cultureel Woordenboek	natuurkunde-scheikunde-en-sterrenkunde/waterstof
dynodwr Encyclopædia Britannica Online	science/hydrogen
dynodwr Encyclopædia Universalis	hydrogene
dynodwr Freebase	/m/02h9byz
dynodwr KBpedia	Hydrogen
dynodwr Klexikon (erthygl)	Wasserstoff
dynodwr LCAuth	sh85063416
dynodwr MeSH	D006859
dynodwr NDL	00571624
dynodwr NE.se	väte
dynodwr NKC	ph127177
dynodwr PSH	5743
dynodwr Quora	Hydrogen
dynodwr Treccani	idrogeno
dynodwr Wolfram Language (endid)	Entity["Element", "Hydrogen"]
dynodwr YSO	16151
dynodwr thesawrws Senedd y DU	297645
dynodwr yn thesawrws y BNCF	18656
rhif E	E949

Hidrogen (H)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Hydrogen

1H

2D

3T

4H

5H

6H

7H

hanes

source

Nuclear Screening Constants

¹H

²D

³T

⁴H

⁵H

⁶H

⁷H