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Atoms And The Atomic Theory
Test Description: This review covers information on discoveries that led to the most recent theory on atoms.
Instructions: Answer all questions to get your test result.
1) What charge do the fast-moving particles emitted by uranium have?
A
positive
B
neutral
C
alternating
D
negative
2) Who discovered the fast-moving particles emitted by the element uranium?
A
Thomson
B
Dalton
C
Rutherford
D
Chadwick
3) What was the name given to the fast-moving particles emitted by uranium?
A
gamma
B
delta
C
beta
D
alpha
4) Which scientist stated that atoms of the same element have the same mass?
A
Dalton
B
Thomson
C
Chadwick
D
Rutherford
5) Which scientist conducted an experiment where he observed a glowing beam of light between two charged metal disks?
A
Dalton
B
Chadwick
C
Rutherford
D
Thomson
6) After Rutherford making his observations during his gold foil experiment, he concluded that the positive charges of an atom are:
A
the number of fast-moving particles equals the number of slow-moving particles
B
evenly distributed throughout the atom
C
not evenly distributed throughout the atom
D
the number of neutrons equals the number of electrons
7) Rutherford was able to modify the atomic theory based on his gold foil experiment where he proposed:
A
an atoms positive charge is located in the nucleus
B
an atoms positive charge is located in the empty space between the electrons and the nucleus
C
an atoms positive charge was due to the number of electrons in orbit around the nucleus
D
an atoms negative charge is located in the nucleus
8) Which scientist is credited with the discovery of the electron?
A
Thomson
B
Rutherford
C
Dalton
D
Chadwick
9) Even though Rutherford predicted the existence of a third subatomic particle, who actually conducted an experiment to show neutrons existed?
A
Thomson
B
Chadwick
C
Dalton
D
Keppler
10) Another conclusion Rutherford was able to make based on the results of his gold foil experiment was:
A
uranium and strontium were heavier than gold
B
the mass of an electron was almost equal to the mass of a neutron
C
beta particles were only given off by uranium
D
the amount of positive charge varies from element to element
*select an answer for all questions
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