1. Write chemical formulas for the following Ionic Compounds:
BELLWORK 11/23/15
Write chemical formulas for the following Ionic Compounds:
Iron (II) oxide
Sodium sulfide
Copper (I) nitride

2. 3 TYPES OF IONIC COMPOUNDS
Metal + Non -Metal Ex: NaCl
Transitional Metal + Non-Metal
Ex: Cu (II) chloride  CuCl2
Metal + Polyatomic Ion Ex: Na2SO4 •

3. BINARY IONIC COMPOUNDS
Binary means a compound formed between two elements.

4. Ex: BINARY IONIC COMPOUNDS
NaBr
MgF2
Sodium Bromide
Magnesium Fluoride

5. BINARY IONIC COMPOUNDS
Potassium Chloride
Aluminum Oxide
• notice ending of name is ide!
K+Cl- -> KCl
Al23+O32- -> Al2O3

6. Writing Formulas with Transition Metals
FeCl3
FeCl2
Iron (III) Chloride
Iron (II) Chloride

7. TERNARY IONIC COMPOUNDS
Ternary means a compound formed between 3 different elements.
These compounds usually contain Poly-atomic Ions

8. Polyatomic Ions
Definition •tightly bound groups of atoms that behave as a unit and carry a negative charge.
Exception: NH4+
Example SO32-, NO2-, ClO2-

9. Ternary Ionic Compounds:Writing Formulas
Ca2+(CO3)2- 
CaCO3

10. Write the formulas for these
Lithium sulfide
tin (II) oxide
tin (IV) oxide
Magnesium fluoride
Copper (II) sulfate
Iron (III) phosphide
gallium nitrate
Iron (III) sulfide

11. Write the formulas for these
Ammonium chloride
ammonium sulfide
barium nitrate

12. Things to look for
If cations have (), they are transitional metals. If anions end in -ide they are probably off the periodic table (Monoatomic)
If anion ends in -ate or -ite it is polyatomic