hydrogen ion

[/ˈhaɪdrədʒən ˈaɪən/]
nounpl: hydrogen ions
íon de hidrogênio
1. a positively charged atom of hydrogen (H+) formed by the loss of an electron; also known as a proton in aqueous solutions
The concentration of hydrogen ions determines the acidity of a solution.
A concentração de íons de hidrogênio determina a acidez de uma solução.
2. in chemistry, the hydronium ion (H3O+) formed when a hydrogen ion combines with water
Hydrogen ions in water exist primarily as hydronium ions.
Os íons de hidrogênio na água existem principalmente como íons hidrônio.
This is a technical scientific term used universally in chemistry education and research across both Brazil and the United States. It is fundamental to understanding pH, acid-base chemistry, and aqueous solutions. The term is standardized in academic curricula and does not vary significantly between regions or cultures.
Synonyms / Sinônimos
protonH+ ionhydronium ion
Antonyms / Antônimos
hydroxide ionOH- ion

Regional Variations

General Brazilian
íon de hidrogênio
standard term used in chemistry education and scientific literature
São Paulo
íon de hidrogênio
common in academic and industrial contexts
Portugal
ião de hidrogénio
uses European Portuguese spelling (ião instead of íon)

Related Words

pH scaleacidityprotonhydronium ionacid dissociationionization
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