Atoms, Molecules, and Nuclear Chemistry CDS Questions

CDS Chemistry

Atoms, Molecules, and Nuclear Chemistry MCQ Questions


1.
Who discovered the electron?
A.
Ernest Rutherford
B.
John Dalton
C.
James Chadwick
D.
J.J. Thomson
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ANSWER :
D. J.J. Thomson
2.
What is the nature of the electric charge carried by an electron?
A.
Variable, depending on the atom
B.
Neutral (no charge)
C.
Negative
D.
Positive
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ANSWER :
C. Negative
3.
Who is credited with the discovery of the proton?
A.
J.J. Thomson
B.
James Chadwick
C.
Niels Bohr
D.
Ernest Rutherford
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ANSWER :
D. Ernest Rutherford
4.
Who discovered the neutron?
A.
Ernest Rutherford
B.
Niels Bohr
C.
James Chadwick
D.
Erwin Schrodinger
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ANSWER :
C. James Chadwick
5.
Rutherford's gold foil experiment led directly to the discovery of the:
A.
Electron
B.
Neutron
C.
Isotope
D.
Atomic nucleus
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ANSWER :
D. Atomic nucleus
6.
According to Bohr's model of the atom, electrons revolve around the nucleus in:
A.
Random paths with no definite energy
B.
Straight lines radiating from the nucleus
C.
A diffuse cloud with no defined path
D.
Fixed circular orbits of definite energy
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ANSWER :
D. Fixed circular orbits of definite energy