# hydrogen
## English
### Etymology

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

### Pronunciation

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

### Noun

hydrogen (countable and uncountable, plural hydrogens)
* The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.
** 1997, Ian McEwan, Enduring Love, Vintage (1998), page 3:It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars.
** For more quotations using this term, see Citations:hydrogen.
** An atom of the element.
* Molecular hydrogen (H$_2$), a colourless, odourless and flammable gas at room temperature.
** A molecule of this molecular species
* 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 PdH$_x$ and PdD$_x$ […] a resistivity maximum is found near 50 K.
* A sample of the element/molecule.

#### Synonyms

* E949 (when used as a packaging agent)
* waterstuff
* element 1
* dihydrogen
* hydrogen hydride

#### Hyponyms

* deuterium
* protium
* tritium
* 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

* antihydrogen
* antimoniated hydrogen
* antimoniureted hydrogen, antimoniuretted hydrogen
* arseniureted hydrogen, arseniuretted hydrogen
* biohydrogen
* black hydrogen
* blue hydrogen
* brown hydrogen
* carbureted hydrogen, carburetted hydrogen
* dark hydrogen
* dihydrogen
* disodium hydrogen phosphate
* gray hydrogen
* green hydrogen
* grey hydrogen
* heavy hydrogen
* hycean
* hydricity
* hydrogen-0
* hydrogen-1
* hydrogen-2
* hydrogen-3
* hydrogen acetate
* hydrogen acid
* hydrogen air
* hydrogen arsenate
* hydrogen arsenide
* hydrogenate
* hydrogenation
* hydrogen balloon
* hydrogen bomb
* hydrogen bond
* hydrogen-bonded
* hydrogen-bonding
* hydrogen bromide
* hydrogen burning
* hydrogen car
* hydrogen carbonate
* hydrogen chlorate
* hydrogen chloride
* hydrogen chlorite
* hydrogen cyanide
* hydrogen cycle
* hydrogen dioxide
* hydrogen disulfide, hydrogen disulphide
* hydrogen economy
* hydrogen electrode
* hydrogen embrittlement
* hydrogeneted, hydrogenetted
* hydrogen fluoride
* hydrogen gas
* hydrogen gas electrode
* hydrogen halide
* hydrogen harmonicon
* hydrogen hydroxide
* hydrogenian
* hydrogenic
* hydrogenide
* hydrogeniferous
* hydrogen iodate
* hydrogen iodide
* hydrogen ion
* hydrogenise, hydrogenize
* hydrogenium
* hydrogen lamp
* hydrogenless
* hydrogen-like
* hydrogen line
* hydrogenlyase
* hydrogen maser atomic clock
* hydrogen monoxide
* hydrogen nitrate
* hydrogenolysis
* hydrogenonium
* hydrogenosome
* hydrogenotrophic
* hydrogenous
* hydrogenoxalate
* hydrogen oxide
* hydrogen peroxide
* hydrogen phosphate
* hydrogen potassium carbonate
* hydrogen protoxide
* hydrogenselenate
* hydrogen selenide
* hydrogen sodium arsenate
* hydrogen spectral series
* hydrogen spectrum
* hydrogen station
* hydrogensulfate
* hydrogen sulfate, hydrogen sulphate
* hydrogen sulfide, hydrogen sulphide
* hydrogensulfite
* hydrogen sulfite, hydrogen sulphite
* hydrogen telluride
* hydrogen vehicle
* hydrogen warhead
* hydrolley
* hydroquinone
* hydrosulfide, hydrosulphide
* hydrosulphureted, hydrosulphuretted
* hydroxy-
* hydroxyl
* hyperhydrogen
* kaonic hydrogen
* lead hydrogen arsenate
* metallic hydrogen
* monohydrogen
* nascent hydrogen
* non-hydrogen
* nonhydrogen
* normal hydrogen
* normal hydrogen electrode
* nuclear hydrogen detection meter
* organohydrogen
* orthohydrogen
* oxy-hydrogen
* oxyhydrogen
* parahydrogen
* phosphorated hydrogen
* phosphoretted hydrogen
* phosphureted hydrogen, phosphuretted hydrogen
* photohydrogen
* potassium hydrogen carbonate
* radiohydrogen
* red hydrogen
* seleniureted hydrogen, seleniuretted hydrogen
* sodium hydrogen arsenate
* sodium hydrogen carbonate
* sodium hydrogen phosphate
* sodium hydrogen sulfite, sodium hydrogen sulphite
* solid hydrogen
* standard hydrogen electrode
* sulfide of hydrogen, sulphide of hydrogen
* sulfureted hydrogen, sulphuretted hydrogen
* tellureted hydrogen, telluretted hydrogen
* telluride of hydrogen
* trihydrogen

#### Related terms

* hydrate
* hydr-, hydro-
* hydric
* hydride
* hydriodic
* hydrion
* hydrogenase
* hydrogenite
* hydronium

#### Descendants

* → Burmese: ဟိုက်ဒရိုဂျင် (huikda.ruigyang)

#### See also

Periodic table of elements in English · periodic table of elements (layout · text) :
| PeriodGroup | 1 | 2 | | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 1 | 1 H hydrogen | | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | Color of the number (state of matter at STP): liquid, gas, solid, synthetic, not yet been discovered | | | | | | 2 He helium |
| 2 | 3 Li lithium | 4 Be beryllium | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | Blocks: d-block f-block p-block s-block | 5 B boron | 6 C carbon | 7 N nitrogen | 8 O oxygen | 9 F fluorine | 10 Ne neon |
| 3 | 11 Na sodium | 12 Mg magnesium | | | | | | | | | | | | 13 Al aluminum | 14 Si silicon | 15 P phosphorus | 16 S sulfur | 17 Cl chlorine | 18 Ar argon |
| 4 | 19 K potassium | 20 Ca calcium | | 21 Sc scandium | 22 Ti titanium | 23 V vanadium | 24 Cr chromium | 25 Mn manganese | 26 Fe iron | 27 Co cobalt | 28 Ni nickel | 29 Cu copper | 30 Zn zinc | 31 Ga gallium | 32 Ge germanium | 33 As arsenic | 34 Se selenium | 35 Br bromine | 36 Kr krypton |
| 5 | 37 Rb rubidium | 38 Sr strontium | | 39 Y yttrium | 40 Zr zirconium | 41 Nb niobium | 42 Mo molybdenum | 43 Tc technetium | 44 Ru ruthenium | 45 Rh rhodium | 46 Pd palladium | 47 Ag silver | 48 Cd cadmium | 49 In indium | 50 Sn tin | 51 Sb antimony | 52 Te tellurium | 53 I iodine | 54 Xe xenon |
| 6 | 55 Cs cesium | 56 Ba barium | * | 71 Lu lutetium | 72 Hf hafnium | 73 Ta tantalum | 74 W tungsten | 75 Re rhenium | 76 Os osmium | 77 Ir iridium | 78 Pt platinum | 79 Au gold | 80 Hg mercury | 81 Tl thallium | 82 Pb lead | 83 Bi bismuth | 84 Po polonium | 85 At astatine | 86 Rn radon |
| 7 | 87 Fr francium | 88 Ra radium | ** | 103 Lr lawrencium | 104 Rf rutherfordium | 105 Db dubnium | 106 Sg seaborgium | 107 Bh bohrium | 108 Hs hassium | 109 Mt meitnerium | 110 Ds darmstadtium | 111 Rg roentgenium | 112 Cn copernicium | 113 Nh nihonium | 114 Fl flerovium | 115 Mc moscovium | 116 Lv livermorium | 117 Ts tennessine | 118 Og oganesson |
| * lanthanides | * lanthanides | * lanthanides | * lanthanides | 57 La lanthanum | 58 Ce cerium | 59 Pr praseodymium | 60 Nd neodymium | 61 Pm promethium | 62 Sm samarium | 63 Eu europium | 64 Gd gadolinium | 65 Tb terbium | 66 Dy dysprosium | 67 Ho holmium | 68 Er erbium | 69 Tm thulium | 70 Yb ytterbium |
| ** actinides | ** actinides | ** actinides | ** actinides | 89 Ac actinium | 90 Th thorium | 91 Pa protactinium | 92 U uranium | 93 Np neptunium | 94 Pu plutonium | 95 Am americium | 96 Cm curium | 97 Bk berkelium | 98 Cf californium | 99 Es einsteinium | 100 Fm fermium | 101 Md mendelevium | 102 No nobelium | | |

### References

* Hydrogen on the British Royal Society of Chemistry's online periodic table

### Further reading

* hydrogen on Wikipedia.Wikipedia

## Danish
### Etymology

From French hydrogène.

### Noun

hydrogen n (singular definite hydrogenet, not used in plural form)
* hydrogen
    Synonym: brint

### References

* “hydrogen” in Den Danske Ordbog

## Norwegian Bokmål
### Noun

hydrogen n (definite singular hydrogenet) (uncountable)
* hydrogen (chemical element, symbol H)

#### Derived terms

* hydrogencyanid
* hydrogenkarbonat
* hydrogenklorid
* hydrogensulfid
* hydroksid

## Norwegian Nynorsk
### Noun

hydrogen n (definite singular hydrogenet) (uncountable)
* hydrogen (chemical element, symbol H)

#### Derived terms

* hydrogencyanid
* hydrogenkarbonat
* hydrogenklorid
* hydrogensulfid
* hydroksid

## Welsh
### Etymology

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

### Pronunciation

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

### Noun

hydrogen m (uncountable, not mutable)
* 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