1. What is an atomic orbital?
A.
A fixed circular path of an electron
B.
A region around the nucleus where an electron is most likely to be found
C.
The complete atom without its nucleus
D.
A group of protons in the nucleus
Correct Answer:
A region around the nucleus where an electron is most likely to be found
2. An orbital represents the region where the probability of finding an electron is:
A.
Maximum
B.
Zero everywhere
C.
Always exactly 100%
D.
The same as the number of protons
Correct Answer:
Maximum
3. Which statement correctly defines an orbital?
A.
It is the path followed by an electron
B.
It is a region of space with a high probability of finding an electron
C.
It is the nucleus of an atom
D.
It is the total number of electrons in an atom
Correct Answer:
It is a region of space with a high probability of finding an electron
4. An orbital is best described as a:
A.
Three-dimensional region around the nucleus
B.
Straight line joining two nuclei
C.
Circular ring inside the nucleus
D.
Collection of neutrons
Correct Answer:
Three-dimensional region around the nucleus
5. What does an atomic orbital show?
A.
The exact path of an electron
B.
The likely region in which an electron may be found
C.
The number of neutrons in an atom
D.
The mass of the nucleus
Correct Answer:
The likely region in which an electron may be found
6. Which term refers to a region of space around the nucleus where an electron is likely to be present?
A.
Orbit
B.
Orbital
C.
Nucleon
D.
Isotope
Correct Answer:
Orbital
7. An orbital does not represent the:
A.
Likely location of an electron
B.
Region around the nucleus
C.
Exact path of an electron
D.
Distribution of electron probability
Correct Answer:
Exact path of an electron
8. The main idea in the definition of an orbital is the probability of finding a(n):
A.
Electron
B.
Proton
C.
Neutron
D.
Nucleus
Correct Answer:
Electron
9. Where is an electron most likely to be found according to the orbital concept?
A.
In a region represented by its orbital
B.
Only on the surface of the nucleus
C.
Only along a fixed circular line
D.
Only outside the atom
Correct Answer:
In a region represented by its orbital
10. Which description of an orbital is scientifically correct?
A.
A definite circular track of an electron
B.
A space region where there is a high chance of finding an electron
C.
A particle found inside the nucleus
D.
A shell made only of neutrons
Correct Answer:
A space region where there is a high chance of finding an electron
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