Anions

Definition

Anions are negatively charged ions formed when an atom gains one or more electrons. They play a crucial role in various biological and chemical processes.

5 Must Know Facts For Your Next Test

1. Anions are attracted to the positive electrode (anode) during electrolysis.
2. The most common anions in biological systems include chloride (Cl-), bicarbonate (HCO3-), and phosphate (PO4^3-).
3. Anions are essential for maintaining the pH balance within cells and tissues.
4. Anions can form ionic bonds with cations to create salts, which are vital for cellular functions.
5. The presence of different anions can affect the solubility of compounds in water.

Review Questions

• What is the charge of an anion?
• Name two common anions found in biological systems.
• How do anions contribute to the formation of salts?

Related terms

Cations: Positively charged ions formed when an atom loses one or more electrons.

Electrolyte: Substances that dissociate into ions in solution, making them capable of conducting electricity.

Ionic Bond: A type of chemical bond formed through the electrostatic attraction between oppositely charged ions.