Acation is an atom that electrons; while an anion is an atom that electrons

A cation is an atom that has more number of protons than electrons electrons; while an Anion is an atom that has more number of electrons than protons.

Explanation:

A cation is an atom or a molecule which is positively charged, i.e. has more number of protons than electrons, and is attracted to the cathode (negative electrode) during electrolysis

An anion is an atom or a molecule which is negatively charged, i.e. has more number of electrons than protons and is attracted to the anode (positive electrode) in electrolysis.

Because of these characteristic, of being negatively and positively charged, anions and cations usually form bonds. These are known as ionic bonds and exist due to the mutual attraction of oppositely charged ions.

substitution is the answer in this case

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