An ion that carries a negative charge due to the gain of one or more electrons.
From the greek word "anion" meaning "going up".
- Anions are negatively charged ions.
- Anions are found in many minerals and salts.
- Anions are formed when a neutral atom gains one or more electrons.
- Anions are attracted to positively charged ions or cations.
- Anions play an important role in many chemical reactions.