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Chemistry Unit Review
Test Description: Chemistry covering from Tools of Measurement to Physical Chemical Changes
Instructions: Answer all questions to get your test result.
1) All matter is made of extremely small particles called ______________.
A
molecules
B
atoms
C
elements
D
compounds
2) At the center of every atom lies a small, dense ______________ that is positively charged.
A
orbital cloud
B
electron
C
nucleus
D
neutron
3) Neon is a _________________.
A
transition metal
B
metal
C
nonmetal
D
metalloid
4) Elements in the same family have _______________________.
A
nothing in common
B
similar properties
C
adhesive properties
D
different properties
5) What are the vertical columns in the periodic table called?
A
groups
B
periods
C
families
D
both A and B
6) How would sugar be classified?
A
compound
B
mixture
C
element
7) Suppose your teacher has a container filled with iron and rocks. Your teacher uses a magnet to separate the iron form the rocks. The original container of iron and sand could be called a ______________________________.
A
mixture
B
solution
C
chemical compound
8) The three main categories of elements on the periodic table are __________,_____________and ____________.
A
pure substances, compounds, and mixtures
B
alloys, nonmetals, and metalloids
C
metals, nonmetals, and metalloids
9) With litums paper, what color represents a base?
A
Blue
B
White
C
Red
10) _____________ and _____________ have about the same mass and are found in the nucleus of an atom.
A
Protons and Neutrons
B
Neutrons and Electrons
C
Electrons and Protons
11) Within the atom, there are three subatomic particles called protons, newton, and orbital rings.
A
true
B
false
12) Phenolthalein becomes what color in an acid?
A
blue
B
red
C
clear
D
magenta (pink)
13) Which pH number indicates a strong base?
A
pH8
B
pH7
C
pH 0
D
pH13
14) A burning match is what type of change?
A
Physical
B
Chemical
15) Melting ice is what type of change?
A
Physical
B
Chemical
16) Which substance is the strongest acid?
A
NaOH with a pH 10
B
Blood with a pH 8
C
Lemon Juice with a pH 2
D
Saliva with a pH 6
17) Which of the following is the strongest base?
A
Blood with a pH 8
B
NaOH with a pH 10
C
Bleach with a pH 9
D
saliva with a pH 6
18) Which is a chemical change?
A
melting ice
B
iron rusting
C
boiling water
D
dissolving salt in water
19) There are how many Hydrogen atoms in C6H12O5?
A
5
B
12
C
6
20) Which is a physical change?
A
burning coal
B
tearing paper
C
iron rusting
D
digesting food
*select an answer for all questions
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