Cation
/ˈkætaɪən/
Definition 1 of 1
Pro Tip 1/3Science 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.
Pro Tip 2/3Opposite of Anion
Remember that cations are opposite to anions which carry a negative charge. 
In salt, the sodium cation partners with the chloride anion.
Pro Tip 3/3Pronunciation
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.