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WorksheetsChapter 3 Review
Total questions: 45
Worksheet time: 48mins
Name
Class
Date
1.
Law of Conservation of Mass states that
a)
matter is created
b)
matter is destroyed
c)
matter is neither created nor destroyed
d)
matter does not change
2.
True or False. Law of Conservation of Mass means that the number of atoms of the products is more than the number of atoms in the reactants.
a)
True
b)
False
3.
The first person to ever talk about an atom was...
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Bohr
4.
Which scientist disagreed with the idea that atoms existed?
a)
Democritus
b)
Aristotle
c)
Rutherford
d)
Dalton
5.
The word "atom" comes from a Greek word that means what?
a)
Invisible
b)
Indivisible
c)
Undivided
d)
Pieces
6.
Which scientist developed the first atomic theory?
a)
Aristotle
b)
Dalton
c)
Democritus
d)
Bohr
7.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
8.
Who stated that all atoms of the same element are exactly alike?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Borh
9.
Place the following scientists in order, from earliest to latest:
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton
a)
B,C,A
b)
C,A,B
c)
A,C,B
d)
C,B,A
10.
Rutherford's Gold Foil Experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
11.
Ernst Rutherford discovered which part of the atom through the use of Gold Foil?
a)
Proton
b)
Neutron
c)
Electron
d)
Orbitals
12.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
13.
All elements are composed of
a)
molecules
b)
atoms
c)
neutrons
d)
compounds
14.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
15.
The dense, positively charged mass located in the center of the atom.
a)
nucleus
b)
proton
c)
isotope
d)
molecule
16.
The _________ of an element equals the number of protons in an atom of that element
a)
mass number
b)
atomic weight
c)
atomic number
d)
isotopes
17.
The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.
a)
mass number
b)
atomic number
c)
atomic weight
d)
isotope weight
18.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
19.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
20.
How many protons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?
a)
20
b)
10
c)
2
d)
18
21.
How many neutrons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?
a)
20
b)
25
c)
2
d)
18
22.
How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
a)
34
b)
36
c)
2
d)
40
23.
How many electrons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?
a)
20
b)
45
c)
18
d)
2
24.
How many protons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
a)
34
b)
74
c)
40
d)
36
25.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
26.
What is the atomic mass (rounded to the nearest whole number) of this element
a)
196
b)
196.95
c)
197
d)
79
27.
A carbon atom has _________ protons in its nucleus.
a)
12
b)
12.01
c)
6
d)
18
28.
Be has ___________ neutrons in the nucleus.
a)
5
b)
4
c)
9
d)
13
29.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
30.
How many neutrons does a Hydrogen atom have?
a)
1
b)
2
c)
3
d)
0
31.
How many electrons does an Iodine ion have?
a)
54
b)
126
c)
53
d)
179
32.
How many neutrons does an Oxygen atom have?
a)
8
b)
16
c)
24
d)
7.999
33.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
34.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
35.
What do we call the SI unit for amount of a substance?
a)
Avogadros number
b)
kilogram
c)
mole
d)
liter
36.
A mole of potassium contains 6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
37.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
38.
How many grams are in 1.2 x 1024 atoms of C?
a)
28 grams
b)
24 grams
c)
6.02 grams
d)
1.2 grams
39.
What is the mass of 2.50 mol of Helium gas He?
a)
40 g
b)
10 g
c)
16 g
d)
32 g
40.
What is the mass in grams of 6.25 mol of copper?
a)
126 g
b)
785 g
c)
625 g
d)
397 g
41.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
42.
What is the molar mass of (NH4)2CO3 ?
a)
144 g
b)
138 g
c)
96 g
d)
78 g
43.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
44.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1304 x 1024
d)
8.638 x 10-24
45.
Which represents the greatest mass of sulfur?
a)
1 gram of sulfur
b)
1 atom of sulfur
c)
0.5 mole of sulfur
d)
6.02 x 1023 atoms of sulfur
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