A cation refers to an atom or a group of atoms that bear one or multiple positive electric charges. An anion refers to an atom or a group of atoms that bear one or multiple negative electric charges.

Gold is the current star of metal catalysis, but most gold catalysts cannot control which mirror-image version of a molecule forms during a reaction. The answer lies with the positive catalyst's ...

Ion exchange separates components in a sample depending on their relative ionic strengths and interaction with the stationary phase. The stationary phase is a charged substance that selectively ...