WorksheetsChemistry Unit Assessment
Total questions: 34
Worksheet time: 24mins
Name
Class
Date
1.
What is the periodic table used to display?
a)
famous scientists
b)
known chemical elements
c)
types of chemical and physical reactions
2.
The number of protons in an element is...
a)
equal to the atomic number.
b)
the mass number minus the atomic number.
c)
the atomic number plus its ion charge.
3.
The atomic mass of an element is...
a)
the number of protons in the nucleus.
b)
the number of neutrons in the nucleus.
c)
the number of protons and neutrons in the nucleus.
4.
The atomic number of Oxygen is...
a)
8
b)
15.999
c)
23.999
5.
What is an element?
a)
A pure chemical substance
b)
A physical combination of two or more different substances
c)
A chemical combination of two or more different substances
6.
What is a compound?
a)
A pure chemical substance
b)
A physical combination of two or more different substances
c)
A chemical combination of two or more different substances
7.
What is a mixture?
a)
A pure chemical substance
b)
A physical combination of two or more different substances
c)
A chemical combination of two or more different substances
8.
In which state of matter are particles moving the fastest?
a)
solid
b)
liquid
c)
gas
9.
In which state of matter are particles rigid in a fixed pattern?
a)
solid
b)
liquid
c)
gas
10.
True or False - Within matter, atoms are constantly in motion?
a)
True
b)
False
11.
What is the process called when water physically changes from a liquid to a gas?
a)
a. Condensation
b)
b. Freezing
c)
c. Evaporation
d)
d. Melting
12.
What is the process called when water physically changes from a liquid to a solid?
a)
a. Condensation
b)
b. Freezing
c)
c. Evaporation
d)
d. Melting
13.
What is the process called when water physically changes from a gas to a liquid?
a)
a. Condensation
b)
b. Freezing
c)
c. Evaporation
d)
d. Melting
14.
The subatomic particles found in the nucleus of an atom are the ____________ and the ____________.
a)
electrons
b)
protons
c)
molecules
d)
neutrons
15.
The subatomic particles that orbit the nucleus are the...
a)
electrons
b)
protons
c)
neutrons
d)
molecules
16.
The positively charged subatomic particles are the...
a)
electrons
b)
protons
c)
neutrons
d)
molecules
17.
The subatomic particles that do not have a charge are the...
a)
electrons
b)
protons
c)
neutrons
d)
molecules
18.
The negatively charged subatomic particles are the...
a)
electrons
b)
protons
c)
neutrons
d)
molecules
19.
Which element has more mass, Sodium or Magnesium?
a)
a. Sodium
b)
b. Magnesium
c)
c. They have the same mass.
20.
What is evidence of a chemical change?
a)
a. Change in size
b)
b. Change in odor (smell)
c)
c. Change in shape
d)
d. Change in state
21.
What is evidence of a physical change? Select all that apply.
a)
a. Change in size
b)
b. Change in odor (smell)
c)
c. Change in shape
d)
d. Change in state
22.
A change in matter that does not create a new substance is a...
a)
Physical Change
b)
Chemical Change
23.
A change that is usually reversible is a...
a)
Physical Change
b)
Chemical Change
24.
A change in matter that creates a new substance is a...
a)
Physical Change
b)
Chemical Change
25.
Label the atom
a)
negative
b)
positive
c)
neutral
1
2
3
1)
2)
3)
26.
Zirconium has how many Protons?
27.
How many protons are in an atom of iron?
28.
Label the following item
a)Proton
b)Electron
c)Neutron
1
2
3
1)
2)
3)
29.
Beryllium has how many protons?
30.
Zirconium has how many Electrons?
31.
Label the states of matter
a)
liquid
b)
gas
c)
solid
d)
ice
1
2
3
1)
2)
3)
32.
A Scientist would study (a) in Chemistry.
Choose from the below words
states of matter
rocks
plant cells
gravity
33.
Match the following properties with the state of matter
a)
Definite shape and volume
1.
Solid
b)
No defined shape, but has a definite volume
2.
Liquid
c)
No definite shape or volume
3.
Gas
34.
Label the 3 states of matter shown here
a)
Solid
b)
Liquid
c)
Gas
1
2
3
1)
2)
3)
100 %
