1. Predicting Ionic Charges 1+ 2+3+ 4+ 4- 3- 2- 1- 0

2. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 1. Sodium hydroxide Na + + OH - NaOH

3. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 2. Zinc cyanide Zn 2+ + CN-  Zn CN 2 2 ( )

4. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 3. Calcium acetate + Ca C 2 H 3 O 2 ( ) Use Reference Sheet C 2 H 3 O 2 -1 Ca 2+ 2 2 

5. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 4. Ammonium nitrate + NH 4 NO 3 Use Reference Sheet NO 3 1- NH 4 1+ 

6. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 5. Zinc nitrate + Zn NO 3 ( ) Use Reference Sheet NO 3 1- Zn 2+ 2 2 

7. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 6. Iron(III) sulfate + Fe SO 4 ( ) Use Reference Sheet SO 4 2- Fe 3+ 3 3  2 2

8. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 7. Cobalt(II) Chromate + CoCrO 4 Use Reference Sheet CrO 4 2- Co 2+ 

9. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 8. Cobalt(II) nitrate + Co NO 3 ( ) Use Reference Sheet NO 3 1- Co 2+ 2 2 

10. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 1. Potassium hydroxide K+K+K+K+ + OH - KOH

11. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 2. Calcium hydroxide Ca 2+ + OH-  Ca OH 2 2 ( )

12. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 3. Sodium phosphate Na + + PO 4 3-  Na PO 4 3 3

13. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 4. Aluminum nitrate Al 3+ + Al NO 3 3 3 ( ) Use Reference Sheet NO 3 -1

14. Writing Formulas (Level 1) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 5. Ammonium chloride + Cl -  NH 4 Cl Use Reference Sheet NH 4 +

15. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 6. Ammonium phosphate + NH 4 PO 4 Use Reference Sheet NH 4 +1 PO 4 3- ( ) 3 3

16. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 7. Calcium carbonate Ca 2+ + CaCO 3 Use Reference Sheet CO32-

17. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 8. Zinc acetate + Zn C 2 H 3 O 2 ( ) Use Reference Sheet C 2 H 3 O 2 -1 Zn 2+ 2 2 

18. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 9. Zinc phosphate + Zn PO 4 ( ) Use Reference Sheet PO 4 3- Zn 2+ 2 2  3 3

19. Writing Formulas (Level 2) 1+ 2+3+ 4+ 4- 3- 2- 1- 0 10. Sodium bicarbonate Na + + NaHCO 3 Use Reference Sheet HCO 3 -1

20. Predicting Ionic Charges 1+ 2+3+ 4+ 4- 3- 2- 1- 0