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WorksheetsChemistry Unit Review
Total questions: 15
Worksheet time: 18mins
Name
Class
Date
1.
Which of the following is true?
a)
The element Carbon has an atomic number of 12.
b)
Metals are malleable and have no luster.
c)
Elements are not pure substances.
d)
All elements are found on the periodic table.
2.
Which of the following is true about elements?
a)
All chemicals are elements.
b)
Elements are pure substances that can't be broken down.
c)
Elements can be broken down chemically or electrically.
d)
Elements are made of more than one substance.
3.
What clues tell you that a substance is a compound?
a)
It is made of one substance.
b)
It can't be separated.
c)
It is made of a mixture of elements.
d)
It has a formula.
4.
The compound H2SO4 has how many elements?
a)
3
b)
4
c)
6
d)
7
5.
An unknown element is non-malleable, non-lustrous, and non-conductive. This element is a...
a)
metal
b)
metalloid
c)
non-metal
d)
undetermined
6.
Which of the following elements is found in all 4 places in nature?
a)
carbon
b)
nitrogen
c)
oxygen
d)
H2O
7.
The third picture (c) represents a(n)...
a)
element
b)
compound
c)
mixture
d)
none of the above
8.
Which choice only contains compounds?
a)
N2, H2O, CO2
b)
water, salt, As
c)
salt, wood, candy
d)
salt, H2O, CO2
9.
Cooking a steak represents a...
a)
physical change
b)
chemical change
10.
Dissolving Kool-Aid in water represents a...
a)
physical change
b)
chemical change
11.
Rusting is a chemical change because there is evidence of...
a)
state of matter change
b)
change in size
c)
color change
d)
production of a gas
12.
Which of the following would you look for in a chemical change?
a)
CHNOPS
b)
dissolving
c)
color change, heat/light produced, odor, precipitate, or gas
d)
change in state of matter
13.
A gold-colored crown has a mass of 4491.1g and a volume of 232.7mL. What is its density? Identify the material using this chart:
a)
0.052 g/mL, lithium
b)
19.3 g/mL, gold
c)
2.7 g/mL, aluminum
d)
can't be determined
14.
You measured the mass of a gummy bear to be 3.4g. In 30.0mL of water, the gummy bear displaces the water to 33.5mL. What is the density of the gummy bear, and will it sink or float?
a)
0.97 g/mL, sink
b)
0.97 g/mL, float
c)
1.03 g/mL, sink
d)
1.03 g/mL, float
15.
If you saw a piece of wood in half, the density...
a)
doubles
b)
is half
c)
stays the same
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