Atomic Structure 1
Some questions (c) 2015 by Progress Testing.
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Directions: The diagram below shows the structure of an atom. Use the diagram and
your knowledge of science to answer any questions that follow.
1
Which atomic particles are located in the nucleus of the atom?
A
Neutrons, only
B
Neutrons and electrons
C
Electrons and protons
D Protons and neutrons
2
Which atomic particles are in a unique cloud outside of the nucleus of the atom?
F
Protons, only
G Neutrons and protons
H Electrons, only
J
Protons and electrons
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3
J.J. Thomson is known for his discovery of the electron in 1897. Thomson's discovery
led him to create a model of an atom called the plum pudding model. The diagram
below shows the plum pudding model.
Today, the plum pudding model is considered an inaccurate representation of an atom
because an atom contains a —
A
positively charged central core with neutrons moving around the outside of the
central core.
B
negatively charged central core with electrons moving around the outside of the
central core.
C
positively charged central core with electrons moving around the outside of the
central core.
D negatively charged central core with protons moving around the outside of the
central core.
4
Which of the following best describes an ion with a positive charge?
F
It contains more protons than neutrons.
G It contains more neutrons than protons.
H It contains more protons than electrons.
J
It contains more electrons than protons.
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5
Ernest Rutherford directed the famous gold foil experiment by using a thin piece of
gold foil and shooting alpha particles, particles with two protons and two neutrons
bound together, at the gold foil. The diagram below shows the results of Rutherford's
experiment.
The deflection of some of the alpha particles revealed that the structure of an atom is
composed of a central core that has a —
A
low density with a negative charge.
B
low density with a positive charge.
C
high density with a negative charge.
D high density with a positive charge.
6
Which statement is true regarding the particles that make up atoms?
F
Protons have a negative charge that is balanced out by the positive charge of
neutrons.
G Only neutrons and electrons affect atomic mass.
H Electrons and neutrons have a positive charge.
J
Electrons have a negative charge, while protons have a positive charge.
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7
What is the smallest subatomic particle, and what is its mass?
A
B
C
D
8
Proton, with a mass Electron, with a mass Proton, with a mass Neutron, with a mass of an electron
of a proton
of a neutron
of an electron
Although atoms cannot be seen, their mass can be measured. Which subatomic
particles are primarily responsible for giving an atom its mass?
F
Protons only
G Electrons and neutrons
H Neutrons only
J
9
Protons and neutrons
Which of the following best describes an ion with a negative charge?
A
It contains more neutrons than protons.
B
It contains more protons than electrons.
C
It contains more electrons than protons.
D It contains more neutrons than electrons.
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10
Which subatomic particles have no effect on the net charge of an atom?
F
Protons and neutrons
G Electrons, only
H Neutrons, only
J
Neutrons and electrons
Directions: The diagram below shows the structure of an atom. Use the picture and
your knowledge of science to answer any questions that follow.
11
Which of these best describes the subatomic particle Y in the diagram?
A
Particle Y has no charge and greater mass than the particles located at X.
B
Particle Y has a positive charge and the same mass as the particles located at X.
C
Particle Y has a negative charge and less mass than the particles located at X.
D Particle Y has a negative charge and no mass.
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12
The electrical charge of a proton is —
F
negative.
G neutral.
H negative and positive.
J
13
positive.
The mass of an electron is —
A
substantially greater than the mass of a neutron.
B
substantially less than the mass of a neutron.
C
exactly equal to the mass of a neutron.
D roughly equal to the mass of a neutron.
14
The mass of a proton is —
F
substantially greater than the mass of a neutron.
G roughly equal to the mass of a neutron.
H substantially less than the mass of a neutron.
J
exactly equal to the mass of a neutron.
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15
What type of charge does the cloud surrounding the nucleus possess?
A
A negative charge
B
A neutral charge
C
A positive charge
D A neutral and a positive charge
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