1. Review: Recognizing Chemical Symbols

2. What is the Periodic Table?

3. Next to each element, write whether it is a nonmetal or a metal
Rb metal
Sr metal
Zr metal
Ne nonmetal
Ti metal
H nonmetal
Ni metal
Rh metal
Se nonmetal
F nonmetal

4. **Elements in the same group will have a lot in common**
Next to each element which element would be most similar? Na B Ca Si Cl O Kr
Choose from the elements in this list: K C Be S Al He F
Next to each element, write the symbol of the element it would be most similar to.
(Hint: Elements in the same group will have a lot in common.)
Choose from the elements in this list: P, K, C, Be, S, Al, C, He, F.
Na K
B Al
Ca Be
Si C
Cl F
O S
Kr He

5. What chemical symbol goes with the element?
Write the chemical symbol next to each element name.
Bromine Br
Silicon Si
Gold Au
Iron Fe
Hydrogen H
Helium He
Lanthanum La
Calcium Ca
Bromine
Silicon
Gold
Iron
Hydrogen
Helium
Lanthanum
Calcium
What chemical symbol goes with the element?

6. For each molecule write the number of each type of atom, as well as the total number of atoms.
NO2
C9H8O4
MgO
CuSO4
NO2
N: 1 atom
O: 2 atoms
Total: 3 atoms
C9H8O4
C: 9 atoms
H: 8 atoms
O: 4 atoms
Total: 21 atoms
CuFeS2
Cu: 1 atom
Fe: 1 atom
S: 2 atoms
Total: 4 atoms
MgO
Mg: 1 atom
O: 1 atom
Total: 2 atoms
CuSO4
Cu: 1 atoms
S: 1 atoms
Total: 6 atoms

7. List the reactants and products for each chemical reaction.
Fe2O3 + 2Al → 2Fe + Al2O3
CS2 + 3O2 → CO2 + 2SO2
3PbF2 + 2PCl3 → 2PF3 + 3PbCl2

8. Fill in the number that will make each chemical equation balanced.
Fe3O4 + 2C → ____Fe + 2CO2
2H2O2 → ____H2O + O2
KClO4 → KCl + ____O2
Fe3O4 + 2C → __3__Fe + 2CO2
2H2O2 → __2__H2O + O2
KClO4 → KCl + __2__O2