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ion Definition

ion (īən, -än′)

noun

an electrically charged atom or group of atoms, the electrical charge of which results when a neutral atom or group of atoms loses or gains one or more electrons during chemical reactions, by the action of certain forms of radiant energy, etc.: the loss of electrons results in a positively charged ion (cation), the gain of electrons in a negatively charged ion (anion)

Etymology: arbitrary use (by Michael Faraday) of Gr ion, neut. of iōn, prp. of ienai, to go < IE base *wei-, to go, chase after > L via, way

ion Synonyms

ion

n.

cation, anion, electrically charged particle; see atom 2.

ion Telecom Definition
An atom or group of atoms that has acquired a positive (+) or negative (
ion Usage Examples

Converse of object

  • oxidize: Will acidified potassium dichromate(VI ) oxidize chloride ions to chlorine?
  • dissolve: The particles are on average, 5 microns in diameter and contain dissolved metal ions.

Adjective modifier

  • 2+: This is best shown in the fact that Sn 2+ ions in solution are good reducing agents.
  • 3+: Why, then, does aluminum form Al 3+ ions?
  • hydrated: Group may be used for this job, and the first step is to prepare a PDB file for the hydrated ion.
  • Ca: Na + and Ca 2+ ions can destroy the low density structuring in a cooperative manner.
  • negative: Negative ions Negative ions are bigger than the atoms they come from.
  • inorganic: Carbon dioxide and inorganic ions are thus made available for re-use.

Modifies a noun

  • implantation: For example, ion beam implantation is used to produce nanoparticle clusters in a commercial program.
  • beam: A second small grant was awarded by EPSRC to support additional ion beam hours required to complete the project.
  • microprobe: Some of the most detailed analyzes are undertaken with the ion microprobe.
  • channel: The ion channels are either open or closed; there is no half-way position.
  • spectrometer: Microstructural changes and surface disruption around the crater were investigated using a secondary ion mass spectrometer ( SIMS ).
  • trap: Abstract We investigate theoretically the speed limit of quantum gate operations for ion trap quantum information processors.

Noun used with modifier

  • hydroxide: There must have been some slight reaction with the water to produce hydroxide ions in solution.
  • hydrogen: The copper might react with the hydrogen ions or with the nitrate ions.
  • chloride: In the process, the chlorine is reduced to chloride ions.
  • lithium: Lithium ion battery life around 30 seconds of talktime, or 3 minutes on standby.
  • ammonium: An ammonium ion is formed, together with an amine.
  • potassium: A voltage across the channel acted like a gate voltage in a conventional transistor, shutting off the flow of potassium ions.

Browse dictionary entries near ion

  1. iolite
  2. iodous
  3. iodopsin
  4. iodoprotein
  5. iodometry
  6. iodoform
  7. iodo-
  8. iodized salt
  9. iodize
  10. iodism
  1. ion engine
  2. ion exchange
  3. -ion
  4. Ionesco
  5. Ionia
  6. Ionian
  7. Ionian Islands
  8. Ionian Sea
  9. ionic
  10. ionic bond