Why are they called polyatomic ions? a. They can formmanydifferent types of ions. b. They are groups (many) atoms that are bonded together and act together as an ion. c. They are especially common ions, so there aremanyof them.

  Polyatomic ions are covalently bonded groups of atoms with a positive or negative charge caused by the formation of an ionic bond with another ion. Compounds formed from such ion combinations are called polyatomic ionic compounds, but the polyatomic ion behaves as a single unit.

Explanation:

confused

confused             hewdejdnjnjsnd

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).