Name: _________ Date: ______

Writing Ionic Compound Formulas Worksheet

Directions: Write the formula for each ionic compound using the criss-cross method.

1. Sodium chloride Na+1 Cl-1 Formula: _______

2. Magnesium oxide Mg+2 O-2 Formula: _______

3. Calcium bromide Ca+2 Br-1 Formula: _______

4. Aluminum nitride Al+3 N-3 Formula: _______

5. Potassium sulfide K+1 S-2 Formula: _______

6. Iron (III) oxide Fe+3 O-2 Formula: _______

7. Copper (II) chloride Cu+2 Cl-1 Formula: _______

8. Zinc nitrate Zn+2 NO3-1 Formula: _______

9. Silver iodide Ag+1 I-1 Formula: _______

10. Lead (IV) oxide Pb+4 O-2 Formula: _______

Bonus: Write the formula for the ionic compound formed between potassium and chlorine. K+1 Cl-1 Formula: _______

Answer Key:

1. NaCl
2. MgO
3. CaBr2
4. AlN
5. K2S
6. Fe2O3
7. CuCl2
8. Zn(NO3)2
9. AgI
10. PbO2 Bonus: KCl