1. REVIEW: WRITING AND NAMING COMPOUNDS, BALANCING EQUATIONS, ELEMENT SYMBOLS

2. Ionic, covalent, or acid? Copper (II) hydroxide Ionic HCl Acid
Dinitrogen pentoxide
Covalent
Sodium chloride

3. H2SO4
Acid
Calcium hydroxide
Ionic
Carbon dioxide
Covalent
P2S5
Silver iodide

4. Name the element Pb
Lead Ca
Calcium F
Fluorine Hg
Mercury

5. Au
Gold Cu
Copper Mg
Magnesium Mn
Manganese Fe
Iron

6. When writing the formula for an ionic compound, the _____ is always written first.
Cation (metal)
Metals always ___ ____ electrons.
Give away
What is the ionic symbol for lithium?
Li+1
What is the ionic symbol for sulfur?
S-2
What is the ionic symbol for hydroxide?
OH-1
What is the ionic symbol for ammonium?
NH4+1

7. Covalent compounds are always between 2 _____.
Nonmetals
Naming covalent compounds includes using ___ before the element name.
Prefixes
What is the prefix for 1?
Mono
What is the prefix for 8?
Octa
What is the prefix for 5? 3?
Penta, tri

8. Practice writing the formulas
Calcium sulfate
Ca+2 So = CaSO4
Potassium phosphate
K+1 PO = K3PO4
Iron (II) chloride
Fe+2 Cl = FeCl2
lead (IV) hydroxide
Pb+4 OH = Pb(OH)4
Remember, the Roman numeral tells you the positive charge for the metal!

9. Potassium chloride
K+1 Cl = KCl
Magnesium fluoride
Mg F = MgF2
Ammonium oxide
NH4+1 O = (NH4)2O

10. Name the compound S2O4 Disulfur tetroxide MgI2 Magnesium iodide AlBr3
Aluminum bromide
CrCl3
Chromium (III) chloride
NaOH
Sodium hydroxide
CaSO4
Calcium sulfate

11. Balancing equations
The law of conservation of mass and matter says matter cannot be created or destroyed!
All chemical equations must, therefore, be balanced!
Look at this formula: Pb(OH)4
There are ____ lead atoms, ____ oxygen atoms and ____ hydrogen atoms
1, 4,4
The formula Fe2(SO4)3 contains ____ Fe atoms, ___ S atoms and ___ O atoms
2, 3, 12

12. Now balance the following!
___ H2 + ___ O2 → ___ H2O
2,1,2
___ N2 +___ H2 → ___ NH3
1,3,2
____Zn + ____ HCl → ___ ZnCl2 + ___ H2
1,2,1,1
___ Fe + ___ O2 → ___ Fe2O3
4,3,2

13. THAT’S ALL FOR THE REVIEW!!
AS ALWAYS, COME SEE ME IF YOU NEED SOME EXTRA HELP!!