Polyatomic Ions – Ions with an overall charge that are
made of more than one atom.
Polyatomic Ions Flashcards
1. Fold your colored paper into 9 sections
2. Write the following names of polyatomic ions in the individual
boxes:
1. Ammonium
2. Nitrate
3. Hydroxide
4. Bicarbonate (Hydrogen Carbonate)
5. Acetate
6. Carbonate
7. Sulfate
8. Phosphate
9. Cyanide
3. Use p. 221 in your textbook to write down the formulas and
charges on the back of the page to make flashcards
4. Cut out the 9 squares of paper and quiz a partner for 8 min.
Naming Compounds with Polyatomic Ions
1. Write the name of the metal and Roman numeral
(if necessary)
2. Write the name of the polyatomic ion
Example: Na2SO4
Example: Cu(NO3)2
Writing Formulas with Polyatomic Ions
1. Determine the symbols and charges of the cation & anion
2. Write the cation first and the anion second
3. Put the polyatomic ion in parentheses
4. Decide what subscripts are needed to make the ionic
compound neutral
Example: sodium carbonate
Example: copper (II) cyanide