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Atom Review
Test Description: Review atomic theory
Instructions: Answer all questions to get your test result.
1) Which subatomic particle has a positive charge?
A
Electron
B
Proton
C
Neutron
2) Which subatomic particle has a negative charge?
A
Proton
B
Neutron
C
Electron
3) Which subatomic particle has a neutral charge?
A
Neutron
B
Proton
C
Electron
4) Where are protons found?
A
In the nucleus
B
In the electron cloud
C
Outside the nucleus
D
On the valence shell
5) Where are neutrons found?
A
In the nucleus
B
In the electron cloud
C
On the valence shell
D
Outside the valence shell
6) The area containing electrons is called...
A
the electron orbitals
B
the electron cloud
C
the electron region
D
the electron collectron
7) Electrons that exist on the edge of the atom are called...
A
Outer electrons
B
Boundary electrons
C
Balance electrons
D
Valence electrons
8) What is an ion?
A
An atom with more or less electrons than usual
B
An atom with more or less neutrons than usual
C
An atom with more or less protons than usual
9) What is an isotope?
A
An atom with more or less neutrons than usual
B
An atom with more or less protons than usual
C
An atom with more or less electrons than usual
10) Which subatomic particle can not be changed and can be used to identify an atom?
A
Neutron
B
Proton
C
Electron
11) How do you determine the number of protons in an atom?
A
It is the same as the atomic number
B
Count the columns on the periodic table
C
It is the same as the atomic mass
D
It equal to the atomic mass minus the atomic number
12) How do you determine the number of electrons in an atom?
A
Count the columns on the periodic table
B
It is the same as the atomic mass
C
It is equal to the atomic mass minus the atomic number
D
It is the same as the atomic number
13) How do you determine the number of valence electrons in an atom?
A
It is equal to the atomic mass minus the atomic number
B
Count the columns on the periodic table
C
It is the same as the atomic number
D
It is the same as the atomic mass
14) How do you determine the number of neutrons in an atom?
A
Count the columns on the periodic table
B
It is the same as the atomic mass
C
It is the same as the atomic number
D
It is equal to the atomic mass minus the atomic number
15) If you took all of the atoms out of a chair, what would be left?
A
The chair would be exactly the same as it was before
B
Only a pool of liquid would be left on the floor
C
The chair would still be there but it would weigh less
D
There would be nothing left of the chair
16) All matter in our world, from the single-celled amoeba to the tallest skyscraper in New York City, consists of very small units called -
A
compounds
B
atoms
C
cells
D
particles
17) Niels Bohr proposed an atomic model in which electrons move around the nucleus in circular orbits. This model is now thought to be incorrect because electrons -
A
move from an inner orbit to an outer orbit when energy is absorbed
B
do not move around the nucleus in circular orbits
C
move from an outer orbit to an inner orbit when energy is lost
D
do not move around the nucleus of the atom
18) Most of an atom is made up of --
A
protons
B
electrons
C
neutrons
D
empty space
19) How many neutrons does the element argon have?
A
40
B
18
C
22
D
8
20) How many protons are in an atom of the element chlorine?
A
35
B
18
C
7
D
17
*select an answer for all questions
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