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Physical Science Unit 2 Review
Test Description: All about atoms and molecules.
Instructions: Answer all questions to get your test result.
1) Which subatomic particle has a positive charge?
A
All particles
B
Electron
C
Neutron
D
Proton
2) Which subatomic particle has a negative charge?
A
All particles
B
Electron
C
Proton
D
Neutron
3) Which model of the atom first introduced the idea of a nucleus?
A
Bohr's model
B
Dalton's model
C
Thomson's model
D
Rutherford's model
4) Which model of the atom was modeled after the solar system?
A
Dalton's model
B
Thomson's model
C
Bohr's model
D
Rutherford's model
5) What information does the atomic mass of an element provide?
A
The number of isotopes
B
The sum of electrons and protons in an atom
C
The difference between the number of protons and electrons
D
The number of protons and neutrons in an atom
6) How do scientists determine the number of neutrons in an isotope of an atom?
A
They subtract the atomic number from the atomic mass
B
They add the number of electrons and protons
C
They divide the atomic mass by 2
D
They find the number of protons
7) The atomic number of an atom is the number of ________________.
A
Protons
B
Neutrons
C
Electrons and neutrons
D
Protons and neutrons
8) How many protons are in an element with an atomic number of 8 and a mass number of 18?
A
3
B
18
C
8
D
10
9) What is the smallest particle representing water?
A
An oxygen atom
B
A hydrogen atom
C
Diatomic oxygen
D
A molecule
10) Which of these is a physical property?
A
Does not burn
B
Easy to digest
C
Becomes moldy quickly
D
Malleable
*select an answer for all questions
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