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Hydron (chemistry)

In chemistry, hydron is the general name for the positive hydrogen H+ cation.

Hydron is the name for positive hydrogen ions without regard to nuclear mass, or positive ions formed from natural hydrogen (hydrogen that has not been subjected to isotope separation).

Traditionally, the term "proton" was and is used in place of "hydron", by itself and in many chemical terms. However, such usage is technically incorrect, as only 99.999% of natural hydrogen nuclei are protons; the rest are deuterons and rare tritons.

Hydron was defined by IUPAC in 1988.[1][2]

The negatively-charged counterpart of the hydron is the hydride anion, H-.

Specific varieties of hydron

Proton, having the symbol p or 1H+, refers only to the +1 ion of protium, 1H.

Deuteron, having the symbol 2H+ or D+, refers only to the +1 ion of deuterium, 2H or D.

Triton, having the symbol 3H+ or T+, refers only to the +1 ion of tritium, 3H or T.

See also


  1. ^ International Union of Pure and Applied Chemistry. "hydron". Compendium of Chemical Terminology Internet edition.
  2. ^ Bunnet, J.F.; Jones, R.A.Y. (1968). "Names for hydrogen atoms, ions, and groups, and for reactions involving them (Recommendations 1988)". Pure Appl. Chem. 60 (7): 1115-6.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hydron_(chemistry)". A list of authors is available in Wikipedia.
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