hydrogen ion

noun

Definition of hydrogen ion 

1 : the cation H+ of acids consisting of a hydrogen atom whose electron has been transferred to the anion of the acid

2 : hydronium

Examples of hydrogen ion in a Sentence

Recent Examples on the Web

At the cathode, catalysts split N2 molecules and prompt the hydrogen ions and electrons to react with nitrogen and make ammonia. Robert F. Service, Science | AAAS, "Ammonia—a renewable fuel made from sun, air, and water—could power the globe without carbon," 12 July 2018 The anode, covered with a catalyst, splits water molecules into O2, hydrogen ions, and electrons. Robert F. Service, Science | AAAS, "Ammonia—a renewable fuel made from sun, air, and water—could power the globe without carbon," 12 July 2018 Further testing showed that the feet contained a molecular pump that moves around hydrogen ions, or protons, to make acid. Veronique Greenwood, New York Times, "This Burrowing Clam Is Not Boring. It Uses Acid to Make Its Home.," 14 June 2018 The radio waves are calibrated to target just the less abundant material, in this case hydrogen ions. Jay Bennett, Popular Mechanics, "MIT Achieves Breakthrough in Nuclear Fusion," 28 Aug. 2017 The excited hydrogen ions then slam into the more abundant deuterium ions, and resulting particles fly into the reactor's outer shell, generating heat and electricity. Jay Bennett, Popular Mechanics, "MIT Achieves Breakthrough in Nuclear Fusion," 28 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrogen ion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hydrogen ion

1896, in the meaning defined at sense 1

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The first known use of hydrogen ion was in 1896

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More Definitions for hydrogen ion

hydrogen ion

noun

Medical Definition of hydrogen ion 

1 : the cation H+ of acids consisting of a hydrogen atom whose electron has been transferred to the anion of the acid

2 : hydronium

More from Merriam-Webster on hydrogen ion

Britannica.com: Encyclopedia article about hydrogen ion

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