Download 9/14/09

9/14/09
1. Which is a mixture?
a. Liquid nitrogen in a tank
b. Pure gold
c. Ocean water
d. Table salt (NaCl)
2. Which element in the table is listed first in the
periodic table?
Oxygen
8
a. Oxygen
Carbon
6
b. Carbon
Gold
79
c. Gold
Calcium
70
d. Calcium
99/
9/15/09
9
H
O
O
H
1. A molecule of hydrogen peroxide is shown. Which of
the following shows the correct chemical formula for
this molecule?
a. HO
b. HO2
c. H2O2
d. H2O
2. In which substance are molecules rigidly arranged?
a. The water in a freezer at -2°C
b. The water in a cup at 22°C (room temp)
c. The water in a pot at 100°C
d. The water in a steam engine at 110°C
9/16/09
1. A state of matter in which a substance has a definite
volume, but lacks a definite shape
a. Solid
b. Plasma
c. Gas
d. Liquid
2. When matter changes from a liquid to a gas this
happens
a. Freezing
b. Condensation
c. Melting
d. Vaporization
9/17/09
1. Many drain cleaners contain a substance called sodium
hydroxide. Sodium hydroxide is formed when sodium, oxygen
and hydrogen join chemically. How is sodium hydroxide
classified?
a. A solution
b. A compound
c. An element
d. A mixture
2. What does the law of conservation of matter state?
a. The total mass of the reactants is greater than the total mass of
the product?
b. The total mass of the reactants is less than the total mass of
the products
c. The total mass of the reactants equals the total mass of the
products
d. Matter can not change form
9/18/09
1. A state of matter where there is not definite shape or no
definite volume
a. Liquid
b. Solid
c. Gas
d. Melting
2. The diagram shows the entry for one of the elements in
the periodic table. Based on the diagram an atom of
18
Argon has
a. 18 protons
b. 18 neutrons
c. 40 protons
Argon
d. 40 electrons
40.0
Ar
Answer Key
1. C/B
2. C/A
3. D/D
4. B/C
5. C/A