UNIT 2 - Polyatomic Ions

Question 1

Polyatomic ion

Answer 1

an ion made up of two or more covalently bonded atoms (eg. carbonate ion)

Question 2

Steps for writing the chemical FORMULA of a COMPOUND WITH POLYATOMIC IONS

Answer 2

1. Identify each ion and its charge. Write the positive and negative ions.
2. Below them, write the metal and nonmetal elements again, reverse the ion charges
3. Flip-Flop & Drop
4. Use brackets around the polyatomic ion. Simplify the ratio (reduce subscripts by the common factor)