WorksheetsPre AP Chem - Unit 3 Test
Total questions: 29
Worksheet time: 16mins
Name
Class
Date
1.
Who is the first to propose the existence of atoms?
a)
Dalton
b)
Democritus
c)
Thomson
d)
Aristotle
2.
Who discovered the nucleus of an atom?
a)
Dalton
b)
Bohr
c)
Thomson
d)
Rutherford
3.
Which particle(s) are found in the nucleus of an atom?
a)
Protons
b)
Neutrons
c)
Electrons
4.
For the atom to be neutral, what two particles have to have the same number?
a)
Protons
b)
Neutrons
c)
Electrons
5.
What are these two nitrogen atoms called?
a)
Isotopes
b)
Atomic Numbers
c)
Alpha Particles
d)
Beta Particles
6.
What is the same between these two nitrogen atoms?
a)
Same number of neutrons
b)
Same number of protons and neutrons
c)
Same number of protons
d)
Same number of neutrons and electrons
7.
Which of these likely occurs the most in nature?
a)
Nitrogen - 14
b)
Nitrogen - 15
8.
Which element is the atom below?
a)
Carbon
b)
Fluorine
c)
Sodium
d)
Lithium
9.
What is the mass number of at atom below?
a)
3
b)
6
c)
7
d)
10
10.
What is the atomic number of at atom below?
a)
3
b)
6
c)
7
d)
10
11.
Which subatomic particle has a positive charge?
a)
neutron
b)
proton
c)
electron
12.
Which subatomic particle has no charge?
a)
neutron
b)
proton
c)
electron
13.
What does the number 32 represent?
a)
atomic number
b)
mass number
c)
the element
14.
What does the number 15 represent?
a)
atomic number
b)
mass number
c)
the element
15.
What does the "P" represent?
a)
atomic number
b)
mass number
c)
the element
16.
How many protons does this element have?
(a)
17.
How many electrons does this element have?
(a)
18.
How many neutrons does this element have?
(a)
19.
What is the full name of this element?
(a)
20.
Classify the following substance.
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
21.
Classify the following substance.
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
22.
Classify the following substance.
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
23.
Classify the following picture.
a)
Physical Property
b)
Physical Change
c)
Chemical Property
d)
Chemical Change
24.
Classify the following picture.
a)
Physical Property
b)
Physical Change
c)
Chemical Property
d)
Chemical Change
25.
What state of matter would this be?
a)
Solid
b)
Liquid
c)
Gas
26.
What is the name of the state change that goes from a liquid to a gas?
a)
Vaporization
b)
Deposition
c)
Melting
d)
Freezing
e)
Condensation
27.
Match the correct model from the picture.
a)
Electron Cloud Model
1.
C
b)
Thomson Model
2.
Not pictured
c)
Rutherford Model
3.
A
d)
Dalton's Model
4.
B
e)
Bohr Model
5.
D
28.
What is the correct # of protons, electrons, and neutrons for Cobalt - 59?
a)
27 protons, 59 electrons, & 27 neutrons
b)
59 protons, 59 electrons, & 86 neutrons
c)
27 protons, 27 electrons, & 32 neutrons
d)
27 protons, 32 electrons, & 27 neutrons
29.
Label the atom
a)
negative
b)
positive
c)
neutral
1
2
3
1)
2)
3)
100 %
