Ch.1-8 Test
Name___________________
Date______________
1. Perform the following calculations and express each result to correct number of
significant figures.
a. 4.567 m + 7.34 m – 5.3 m
b. (4.576 m) (7.3 m) (432 m)
c. 4.531 m/ (3.21 sec x 9.1 sec)
2. Determine the number of moles of H2O that are in 44 g of the compound.
3. Find the number of molecules that are in 34 g of CO2.
4. Determine the mass of 3.4 x 1024 atoms of copper.
5. Classify each as a physical property or a chemical property.
6. Complete the following table.
7. Write the noble gas configurations for the following.
a. Potassium (draw an orbital diagram too.)
b. Sulfur
c. Antimony
d. Selenium
Ch.1-8 Test
Name___________________
Date______________
8. Identify the block, period, group, group name (where appropriate), and element
name for the elements with the following electron configurations.
a. [Ne]3s23p1
b. [Ar] 4s23d104p6
9. Of cesium, Cs, hafnium, Hf, and gold, Au, which element has the smallest atomic
radius? Explain your answer in terms of trends in the periodic table.
10. The two ions K+ and Ca2+ each have 18 electrons surrounding the nucleus. Which
would you expect to have the smaller radius? Why?
11. Which element is the most electronegative among C, N, O, Br, and S? Which group
does it belong to?
12. Write the chemical formula for the following. (Refer to the polyatomic ion chart at the last page.)
A. calcium sulfide
B. aluminum sulfate
C. magnesium hydroxide
D. tin (IV) sulfite
E. ammonium nitride
F. chromium (II) phosphate
13. Name the following compounds.
A. CuS
B. ZnSO4
C. P4O10
D. AsCl3 (covalent)
E. Al(OH)3
F. FePO4
Ch.1-8 Test
Name___________________
Date______________
14. Draw Lewis dot diagram for the following elements.
A. Sr
B. S
C. Ne
15. Draw the Lewis structures for the following molecules. Use dots or dashes. Included
all unshared electron pairs. Indicate their molecular geometry.
Lewis Structure
Molecular
Hybridization
Polar or
Geometry
Nonpolar
NI3
H2S
CO
HCN
SO42-
CH2Br2
SF6
C2H2
CH2O
Ch.1-8 Test
Name___________________
Date______________