What is cation and anion?

Answer 1

Cations are positively charged ions. Anions are negatively charged ions. An ion is just an atom with either more electrons than protons (so it would be negatively charged... an anion), or fewer electrons than protons (so it would be positively charged... a cation). It should be noted that not all ions are single atoms. You can have polyatomic (many atom) anions (like SO42-) or cations (like NH4+). These are just molecular compounds that have charge because they have gained or lost electrons.

Answer 2

An anion is any negatively charged ion.

A cation is any positively charged ion.

Answer 3

cations are positively charged ions that are produced when an atom loses electrons and anions are negatively charged ions that are produced when an atom gains electrons.