different between dihydrogen vs hydrogen

English

Etymology

di- +? hydrogen

Noun

dihydrogen (uncountable)

1. (chemistry) The divalent radical formed from two separate hydrogen atoms or ions
2. (chemistry, modifying a noun) Describing a dihydrogen bond
3. (inorganic chemistry) The hydrogen molecule H₂

Usage notes

• Used informally in dihydrogen monoxide, the supposed scientific name for water
• Used in mixed salts, such as calcium dihydrogen phosphate

Derived terms

• calcium dihydrogen phosphate
• dihydrogen arsenate
• dihydrogen monoxide
• dihydrogen oxide
• dihydrogen phosphate

English

Etymology

From French hydrogène, coined by Louis-Bernard Guyton de Morveau, from Ancient Greek ???? (húd?r, “water”) + ?????? (genná?, “I bring forth”). Corresponding to hydro- + -gen.

Pronunciation

• (Received Pronunciation) IPA^(key): /?ha?d??d?(?)n/
• (General American) enPR: h?'dr?j?n, IPA^(key): /?ha?d??d??n/
• Hyphenation: hy?dro?gen

Noun

hydrogen (countable and uncountable, plural hydrogens)

2. 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.
3. Molecular hydrogen (H₂), a colourless, odourless and flammable gas at room temperature.
4. An atom of the element.
5. A sample of the element.

Synonyms

• waterstuff
• E949 when used as a packaging agent

Hyponyms

• deuterium
• protium
• tritium

Derived terms

Related terms

Descendants

• ? Burmese: ????????????? (huikda.ruigyang)

Translations

References

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

Further reading

• hydrogen on Wikipedia.Wikipedia

Danish

Noun

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

1. hydrogen

   Synonym: brint

Norwegian Bokmål

Noun

hydrogen n (definite singular hydrogenet) (uncountable)

1. hydrogen (chemical element, symbol H)

Derived terms

Norwegian Nynorsk

Noun

hydrogen n (definite singular hydrogenet) (uncountable)

1. hydrogen (chemical element, symbol H)

Derived terms

Welsh

Etymology

Borrowed from English hydrogen.

Pronunciation

• (standard) IPA^(key): /?h?dr????n/

Noun

hydrogen m (uncountable, not mutable)

1. hydrogen

   Synonym: (obsolete) ulai

Derived terms

References

• 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