hydrogen

English
Chemical element
H Next: helium (He)

Etymology

From French hydrogène, coined by Louis-Bernard Guyton de Morveau, from Ancient Greek ὕδωρ (húdōr, “water”) + γεννάω (gennáō, “I bring forth”). Corresponding to hydro- +‎ -gen.

Pronunciation
  • (Received Pronunciation) IPA(key): /ˈhaɪdɹədʒ(ə)n/
  • (General American) enPR: hī'drəjən, IPA(key): /ˈhaɪdɹəd͡ʒən/, [ˈhaɪd͡ʒɹəd͡ʒən]
  • Audio (GA)(file)
  • Hyphenation: hy‧dro‧gen

Noun

hydrogen (countable and uncountable, plural hydrogens)

  1. The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.
    • For quotations using this term, see Citations:hydrogen.
    1. An atom of the element.
  2. Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.
    1. A molecule of this molecular species
  3. The isotope hydrogen-1 (also symbol H), contrasting with deuterium and tritium
    Synonym: protium
    • Hydrogen is generally considered to be electronically the same as deuterium. […] In both PdHx and PdDx […] a resistivity maximum is found near 50 K.
  4. A sample of the element/molecule.

Synonyms
element
  • element 1
molecule

Hyponyms
isotopes
molecule
  • deuterium deuteride
  • deuterium hydride
  • deuterium protide
  • deuterium tritide
  • dihydrogen
  • hydrogen deuteride
  • hydrogen hydride
  • hydrogen protide
  • hydrogen tritide
  • orthohydrogen
  • parahydrogen
  • protium deuteride
  • protium hydride
  • protium protide
  • protium tritide
  • tritium deuteride
  • tritium hydride
  • tritium protide
  • tritium tritride

Derived terms

Descendants
  • → Burmese: ဟိုက်ဒရိုဂျင် (huikda.ruigyang)

Translations

See also
Periodic table of elements in English · periodic table of elements (layout · text)
Period
Group
 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1
H		 Color of the number (state of matter at STP): liquid, gas, solid, solid (synthetic), not yet been discovered 2
He
2 3
Li		 4
Be		 Blocks: d-block f-block p-block s-block 5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
3 11
Na		 12
Mg		 13
Al		 14
Si		 15
P		 16
S		 17
Cl		 18
Ar
4 19
K		 20
Ca
21
Sc		 22
Ti		 23
V		 24
Cr		 25
Mn		 26
Fe		 27
Co		 28
Ni		 29
Cu		 30
Zn		 31
Ga		 32
Ge		 33
As		 34
Se		 35
Br		 36
Kr
5 37
Rb		 38
Sr
39
Y		 40
Zr		 41
Nb		 42
Mo		 43
Tc		 44
Ru		 45
Rh		 46
Pd		 47
Ag		 48
Cd		 49
In		 50
Sn		 51
Sb		 52
Te		 53
I		 54
Xe
6 55
Cs		 56
Ba		 *
 71
Lu		 72
Hf		 73
Ta		 74
W		 75
Re		 76
Os		 77
Ir		 78
Pt		 79
Au		 80
Hg		 81
Tl		 82
Pb		 83
Bi		 84
Po		 85
At		 86
Rn
7 87
Fr		 88
Ra		 **
 103
Lr		 104
Rf		 105
Db		 106
Sg		 107
Bh		 108
Hs		 109
Mt		 110
Ds		 111
Rg		 112
Cn		 113
Nh		 114
Fl		 115
Mc		 116
Lv		 117
Ts		 118
Og

* lanthanides 57
La		 58
Ce		 59
Pr		 60
Nd		 61
Pm		 62
Sm		 63
Eu		 64
Gd		 65
Tb		 66
Dy		 67
Ho		 68
Er		 69
Tm		 70
Yb
** actinides 89
Ac		 90
Th		 91
Pa		 92
U		 93
Np		 94
Pu		 95
Am		 96
Cm		 97
Bk		 98
Cf		 99
Es		 100
Fm		 101
Md		 102
No

References

Further reading

Danish

Noun

hydrogen n (singular definite hydrogenet, not used in plural form)

  1. hydrogen
    Synonym: brint

Norwegian Bokmål
Chemical element
H Next: helium (He)

Noun

hydrogen n (definite singular hydrogenet) (uncountable)

  1. hydrogen (chemical element, symbol H)

Derived terms

Norwegian Nynorsk
Chemical element
H Next: helium (He)

Noun

hydrogen n (definite singular hydrogenet) (uncountable)

  1. hydrogen (chemical element, symbol H)

Derived terms

Welsh
Chemical element
H Next: heliwm (He)

Etymology

Borrowed from English hydrogen, from French hydrogène, from Ancient Greek ὕδωρ (húdōr, “water”) + γεννάω (gennáō, “I bring forth”).

Pronunciation
  • (North Wales) IPA(key): /ˈhədrɔˌɡɛn/, /ˈhɨ̞drɔˌɡɛn/
  • (South Wales) IPA(key): /ˈhədrɔˌɡɛn/, /ˈhɪdrɔˌɡɛn/
  • Rhymes: -ədrɔɡɛn, -ɨ̞drɔɡɛn

Noun

hydrogen m (uncountable, not mutable)

  1. hydrogen
    Synonyms: ulai, ulnwy

Derived terms
  • adnewyddu hydrogen (“hydrogen renewability”)
  • alcyleiddio hydrogen fflworid (“hydrogen fluoride alkylation”)
  • bond hydrogen (“hydrogen bond”)
  • derbynnydd hydrogen (“hydrogen acceptor”)
  • halid hydrogen (“hydrogen halide”)
  • hydrogen bromid (“hydrogen bromide”)
  • hydrogen clorid (“hydrogen chloride”)
  • hydrogen fflworid (“hydrogen fluoride”)
  • hydrogen ïodid (“hydrogen iodide”)
  • hydrogen perocsid (“hydrogen peroxide”)
  • hydrogen sylffid (“hydrogen sulphide”)
  • hydrogenaidd (“hydrogenous”)
  • hydrogeneiddio (“hydrogenise, hydrogenate”)
  • ïon hydrogen (“hydrogen ion”)

Further reading
  • R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “hydrogen”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies
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