Chemistry 1 CP Study Guide – Unit 3: Matter
Name _____________________________________ Period _________ Test Date __________________
This study guide is intended to give you an overview of what will be on the test. You should also look
over the notes for each section to be sure you are familiar with the content.
Key Terms (these are also found in your vocabulary lists)
Matter - anything that takes up space and has mass
Extensive property - only depends on the amount of matter (volume, mass, amount of energy)
Intensive property - only depends on the type of matter, not the amount (melting point, boiling
point, density)
Substance - a particular kind of matter – pure (also called a Chemical)
Physical property - a property that can be observed and measured without changing the substance
Solid - matter that cannot flow and has definite volume
Liquid - definite volume but takes the shape of its container (flows)
Gas - a substance without definite volume or shape and can flow
Physical change - a type of change that alters the physical properties of a substance but does not
change its composition
Mixture - Made up of two substances, Variable composition
Heterogeneous mixture - mixture is not the same from place to place
Homogeneous mixture - same composition throughout
Solution - Homogeneous mixture, Mixed molecule by molecule, Can occur between any state of
matter
Phase change - transition of matter from one state to another
Chemistry 1 CP Study Guide – Unit 3: Matter
Practice Problems. Use your notes to complete the information below.
1. Which of the following is not a property of a gas?
a. Has a definite shape
b. Has an indefinite volume
c. Assumes the shape of the container
d. Is easily compressed
2. Which of the following is in a different physical state at room temperature than the other three
states?
a. Salt
b. Sugar
c. Flour
d. Water
3. Complete the following table on the states of matter.
Physical state
Gas
Definite shape?
No
Definite volume?
No
Easily compressed?
Yes
Liquid
No
Yes
No
Solid
Yes
Yes
No
4. Which of the following mixtures are homogeneous? Which are heterogeneous?
a. Gasoline homogeneous
b. Chunky peanut butter heterogeneous
c. Oil and vinegar salad dressing heterogeneous
5. Which of the following is a chemical change?
a. Gasoline boils physical
b. Oxygen is added to gasoline chemical
c. Gasoline burns chemical
d. Gasoline is poured into a tank physical
6. Classify each of the following as physical or chemical.
a. A puddle is dried by the sun physical
b. A dark cloth is faded by sunlight chemical
c. Bread is toasted chemical
d. Soap is mixed with water physical
7. What is the smallest part of all matter? The atom
8. Why haven’t scientists been able to study atoms easily? Because they are so small
Chemistry 1 CP Study Guide – Unit 3: Matter
9. What is the current model of an atom called? Electron cloud model
10. Where is most of the mass of an atom found? In the nucleus (protons + neutrons)
11. Know the charges and sizes (which is the smallest) of protons, neutrons and electrons.
Particle
Charge
Location
Size in AMUs
Proton
+
Nucleus
1 amu
Neutron
0
Nucleus
1 amu
Electron
-
Outside
nucleus
1/1836 amu
12. Know the following from an element on the Periodic Table. You will be provided with a copy of
the Periodic Table to use during the test.
o The symbol
o The atomic mass
o How to find the number of protons, electrons and neutrons an element has:
 Protons = atomic number
 Electrons = protons (usually), so atomic number
 Neutrons = atomic mass – number of protons
or atomic mass – atomic number
13. Fill in the chart below using your Periodic Table:
Element
Symbol
Atomic #
Atomic Mass
# Protons
# Neutrons
# Electrons
Boron
B
5
11
5
6
5
Oxygen
O
8
16
8
8
8
Copper
Cu
29
64
29
35
29
Carbon
C
6
12
6
6
6
Potassium
K
19
39
19
20
19