1. Which statement about an orbital is correct?
A.
It gives the exact path of an electron
B.
It gives a region in which an electron is likely to be present
C.
It contains only the nucleus
D.
It is the same as the atomic mass
Correct Answer:
It gives a region in which an electron is likely to be present
2. An orbital is a mathematical description of the probability of finding an:
A.
Electron
B.
Atom's nucleus
C.
Isotope
D.
Element
Correct Answer:
Electron
3. What is the main idea represented by an orbital?
A.
The exact route of an electron
B.
The probable distribution of an electron around the nucleus
C.
The number of neutrons in an atom
D.
The chemical symbol of an element
Correct Answer:
The probable distribution of an electron around the nucleus
4. Which of the following is a feature of an orbital?
A.
It is a probability region
B.
It is a solid container for an electron
C.
It is the nucleus itself
D.
It is a straight-line path
Correct Answer:
It is a probability region
5. An orbital does not represent:
A.
A region of high electron probability
B.
The possible location of an electron
C.
A three-dimensional probability distribution
D.
A definite path of an electron
Correct Answer:
A definite path of an electron
6. The word orbital is used for a region where the chance of finding an electron is:
A.
Very high
B.
Exactly zero everywhere
C.
Unrelated to the electron
D.
Limited to the nucleus
Correct Answer:
Very high
7. Which of the following best distinguishes an orbital from an orbit?
A.
An orbital is a probability region, whereas an orbit is a definite path
B.
An orbital is the nucleus, whereas an orbit is an electron
C.
An orbital contains protons, whereas an orbit contains neutrons
D.
An orbital is a type of atom, whereas an orbit is a molecule
Correct Answer:
An orbital is a probability region, whereas an orbit is a definite path
8. An orbital is located around the:
A.
Nucleus
B.
Neutron only
C.
Proton only
D.
Atomic mass unit
Correct Answer:
Nucleus
9. Which phrase is most closely related to the definition of an orbital?
A.
Region of maximum electron probability
B.
Fixed path of a proton
C.
Mass of the nucleus
D.
Number of neutrons
Correct Answer:
Region of maximum electron probability
10. What does the shape of an orbital represent?
A.
The region in space where an electron is likely to be found
B.
The exact track of a neutron
C.
The size of the nucleus only
D.
The number of protons in an atom
Correct Answer:
The region in space where an electron is likely to be found
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