Cation

usgb/ˈkætaɪən/
noun

A positively charged atom or group of atoms.

In a water solution, sodium becomes a cation.
Visual representation of "cation" - A positively charged atom or group of atoms.

Often appears as...

  • sodium cation
  • potassium cation

Usage tips

Technical

Definition 1 of 1
Visual representation of "cation"
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Science Context

Cation is commonly used in scientific discussions about chemistry and electricity.

Illustration for Science Context
In this chemical reaction, the magnesium atom loses two electrons to form a magnesium cation.
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Opposite of Anion

Remember that cations are opposite to anions which carry a negative charge.

Illustration for Opposite of Anion
In salt, the sodium cation partners with the chloride anion.
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Pronunciation

Cation sounds like 'cat-eye-on', not to be confused with 'anion' which is 'an-eye-on'.

Illustration for Pronunciation
The teacher asked students to identify the cation in the salt solution.
Visual representation of the word "Cation"

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