Definition

A type of ion that carries a positive charge and moves towards the negative electrode during electrolysis.

Example

In a solution, the cation is attracted to the cathode where it can gain electrons.

Conversation

Did you know that a cation is a positively charged ion?

Really? I didn't know that! How does it work?

Well, cations move towards the negative electrode during electrolysis.

That makes sense! I guess that's why they're important in chemistry.

Synonyms & Antonyms

Root Explanation

Cation → It is formed from "cat-" (from Greek "kation", meaning to go down) and the suffix "-ion" (meaning a particle or entity). The word "cation" refers to a positively charged ion that moves towards the cathode in electrolysis, hence the connection to going down or movement towards a negative charge.

Memory Tip

Think of a particle that is 'going down' ('cat-') towards a negative charge, which helps you remember that a cation is a positively charged ion.

Visually Confused Words