Cation
noun
A positively charged atom or group of atoms.
In a water solution, sodium becomes a cation.

Often appears as...
- sodium cation
- potassium cation
Usage tips
Technical
noun
A positively charged atom or group of atoms.
In a water solution, sodium becomes a cation.

Often appears as...
- sodium cation
- potassium cation
Usage tips
Technical
Definition 1 of 1

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

In this chemical reaction, the magnesium atom loses two electrons to form a magnesium cation.
Opposite of Anion
Remember that cations are opposite to anions which carry a negative charge.

In salt, the sodium cation partners with the chloride anion.
Pronunciation
Cation sounds like 'cat-eye-on', not to be confused with 'anion' which is 'an-eye-on'.

The teacher asked students to identify the cation in the salt solution.
Science Context
Cation is commonly used in scientific discussions about chemistry and electricity.

In this chemical reaction, the magnesium atom loses two electrons to form a magnesium cation.
Opposite of Anion
Remember that cations are opposite to anions which carry a negative charge.

In salt, the sodium cation partners with the chloride anion.
Pronunciation
Cation sounds like 'cat-eye-on', not to be confused with 'anion' which is 'an-eye-on'.

The teacher asked students to identify the cation in the salt solution.
Science Context
Cation is commonly used in scientific discussions about chemistry and electricity.

In this chemical reaction, the magnesium atom loses two electrons to form a magnesium cation.
Opposite of Anion
Remember that cations are opposite to anions which carry a negative charge.

In salt, the sodium cation partners with the chloride anion.
Pronunciation
Cation sounds like 'cat-eye-on', not to be confused with 'anion' which is 'an-eye-on'.

The teacher asked students to identify the cation in the salt solution.
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