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| hy·dro·gen i·on (plural hy·dro·gen i·ons) |
noun |
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| Definition: |
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positively charged ion of hydrogen: a positively charged ion of hydrogen that is formed by the removal of an electron from a hydrogen atom and is present in solutions of acids in water. The degree to which a compound produces hydrogen ions in solution is measured on the pH scale, 1 being highly acidic, 7 being neutral, and 14 being highly alkaline.
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