hydrogen

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Etymology

From French hydrogène, coined by Louis-Bernard Guyton de Morveau, from Ancient Greek ὕδωρ + γεννάω ("I bring forth").

Pronunciation

• (RP) IPA: /ˈhaɪdɹədʒ(ə)n/
• (America) enPR: hī'drəjən, IPA: /ˈhaɪdɹəd͡ʒən/, [ˈhaɪd͡ʒɹəd͡ʒən]

Noun

hydrogen

1. The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.
   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

   Synonyms: 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.
4. A sample of the element/molecule.

Synonyms

• waterstuff
• E949 (when used as a packaging agent)

• element 1

• dihydrogen
• hydrogen hydride

Related terms

• hydrate
• hydric
• hydride

• hydr-, hydro-
• hydriodic
• hydrion
• hydrogenase
• hydrogenite
• hydronium

Translations

• French: hydrogène
• German: Wasserstoff, Hydrogen, Hydrogenium
• Italian: idrogeno

  Brazilian: hidrogênio

  European: hidrogénio

• Russian: водоро́д
• Spanish: hidrógeno

Translations

• French: hydrogène
• German: Wasserstoff

Translations

• German: Wasserstoffatom

  Brazilian: hidrogênio

  European: hidrogénio

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