1. Which term refers to the region of space in which an electron is most likely to be found?
A.
Orbit
B.
Orbital
C.
Nucleus
D.
Shell number
Correct Answer:
Orbital
2. An orbital does not represent a definite:
A.
Region of probability
B.
Location of the nucleus
C.
Path of an electron
D.
Part of an atom
Correct Answer:
Path of an electron
3. Which statement about an orbital is correct?
A.
It gives the exact path of an electron
B.
It represents a region in which an electron may be found
C.
It contains only the nucleus
D.
It is always a circular ring
Correct Answer:
It represents a region in which an electron may be found
4. The word orbital is associated with the probable distribution of:
A.
Electrons around the nucleus
B.
Protons inside the nucleus
C.
Neutrons outside the atom
D.
Nuclei inside a molecule
Correct Answer:
Electrons around the nucleus
5. Which of the following is not a feature of an atomic orbital?
A.
It is a region of space
B.
It is related to electron probability
C.
It is a fixed path like a planet's orbit
D.
It is found around the nucleus
Correct Answer:
It is a fixed path like a planet's orbit
6. An orbital is a mathematical description of the region where an electron is likely to be:
A.
Found
B.
Converted into a proton
C.
Removed from the nucleus
D.
Changed into a neutron
Correct Answer:
Found
7. What does an orbital mainly indicate?
A.
The exact position of an electron at all times
B.
The probable region occupied by an electron
C.
The mass of the nucleus
D.
The number of neutrons in an atom
Correct Answer:
The probable region occupied by an electron
8. An atomic orbital is located primarily around the:
A.
Electron cloud only
B.
Nucleus
C.
Neutron
D.
Proton outside the atom
Correct Answer:
Nucleus
9. Which description distinguishes an orbital from an orbit?
A.
An orbital is a probable 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 and an orbit are exactly the same concept
Correct Answer:
An orbital is a probable region, whereas an orbit is a definite path
10. The shape of an orbital represents the region of:
A.
Maximum electron probability
B.
Maximum proton mass
C.
Zero nuclear charge
D.
Constant neutron movement
Correct Answer:
Maximum electron probability
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