You searched for: “ion
1. An atom, or atoms, a radical, or a molecule, having a negative or positive electric charge; that has gained or lost one or more electrons and thus acquired a net negative or positive charge.

In electrolysis, positive ions (cations) travel to the cathode, while negative ions (anions) travel to the anode.

2. An atom from which one or more electrons have been torn off, leaving a positively charged particle.

Negative ions are atoms which have acquired one or more extra electrons, and clusters of atoms can also become ions.

3. Etymology: from 1834, introduced by English physicist and chemist Michael Faraday, coined from Greek ion, neuter, present participle of ienai, "to go".
This entry is located in the following unit: ion, ion- + (page 1)
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(Greek: ion, "going"; neuter present participle of ienai, "to go"; because an ion moves toward the electrode of an opposite charge)
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An electrically charged atom, or group of atoms, that has lost or gained electrons.

A loss makes the resulting particle positively charged; a gain makes the particle negatively charged.

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lithium-ion battery
A battery that uses lithium metallic oxide in its positive electrode and a carbon material in its negative electrode.
This entry is located in the following unit: Lithium and its future (page 1)