WorksheetsDensity/Classification/Atom Review
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
If I pour the following 4 liquids into a graduated cylinder, which liquid would be the top layer?
a)
Water (1 g/mL)
b)
Oil (0.8 g/mL)
c)
Mercury (13.5 g/mL)
d)
Syrup (3 g/mL)
2.
Which of the following units could be used to express density?
a)
g/mL
b)
cm3
c)
mL
d)
mL/g
3.
Gold has a higher density than iron. Which of the following must be true?
a)
Gold's atoms are closer together than iron's atoms.
b)
Gold's atoms are farther apart than iron's atoms.
c)
Gold's atoms are moving faster than iron's atoms.
d)
Gold's atoms are moving slower than iron's atoms.
4.
What do you call a substance that is made up of only one type of atom?
a)
Compound
b)
Element
c)
Mixture
d)
Solution
5.
Which of the following is classified as a pure substance?
a)
Colloid
b)
Compound
c)
Solution
d)
Suspension
6.
Which of the following is a mixture in which one substance is dissolved in a liquid?
a)
Colloid
b)
Element
c)
Solution
d)
Suspension
7.
Which of the following is a heterogeneous mixture?
a)
Jar of Mixed Nuts
b)
Salt Water
c)
Stainless Steel
d)
Water in a Swimming Pool
8.
What type of mixture separates into layers over time?
a)
Colloid
b)
Homogeneous Mixture
c)
Solution
d)
Suspension
9.
What did J.J. Thomson discover about the atom?
a)
Electron
b)
Neutron
c)
Nucleus
d)
Proton
10.
Which scientist developed the concept of energy levels?
a)
Bohr
b)
Dalton
c)
Rutherford
d)
Thomson
11.
Which of these substances is an element?
a)
Carbon Dioxide (CO2)
b)
Iron (Fe)
c)
Table Salt (NaCl)
d)
Water (H2O)
12.
Which of the following represents an element?
a)
Equation
b)
Formula
c)
Reaction
d)
Symbol
13.
What is the charge of an electron?
a)
Negative
b)
Neutral (No Charge)
c)
Positive
14.
What is in the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Only Neutrons
d)
Only Protons
15.
Where is almost all of the mass of an atom found?
a)
Outside the nucleus
b)
In the electron cloud
c)
In the energy levels
d)
In the nucleus
16.
What is the mass number of an isotope of carbon that has 6 protons, 8 neutrons, and 6 electrons?
a)
6
b)
8
c)
14
d)
20
17.
Although all uranium atoms have 92 protons, one uranium atom has 143 neutrons while another uranium atom has 146 neutrons. What do we call these two uranium atoms?
a)
Ions
b)
Isotopes
c)
Neutral Atoms
d)
Nonmetals
18.
Which of the following is an atom that has a charge due to a loss or gain in electrons?
a)
Ion
b)
Isotope
c)
Neutral Atom
d)
Metal
19.
How many protons are in the following ion?
a)
2
b)
28
c)
31
d)
59
20.
How many electrons are in the following ion?
a)
1
b)
8
c)
9
d)
10
21.
How many neutrons are in the following ion?
a)
18
b)
19
c)
20
d)
39
22.
Which scientist developed the electron cloud model?
a)
Bohr
b)
Dalton
c)
Rutherford
d)
Schrödinger
23.
What is the density of water?
a)
1 g/mL
b)
10 g/mL
c)
1 mL/g
d)
10 mL/g
24.
What is the center of an atom called?
a)
Center
b)
Middle
c)
Neutron
d)
Nucleus
25.
Who developed the model of the atom pictured?
a)
Dalton
b)
Bohr
c)
Rutherford
d)
Thomson
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