1. What is an atomic orbital?
A.
A fixed circular path followed by an electron
B.
A region of space around the nucleus where the probability of finding an electron is high
C.
The nucleus of an atom
D.
The total number of electrons in an atom
Correct Answer:
A region of space around the nucleus where the probability of finding an electron is high
2. An orbital represents the probable location of which particle?
A.
Proton
B.
Neutron
C.
Electron
D.
Nucleus
Correct Answer:
Electron
3. Which statement correctly defines an orbital?
A.
It is a definite path of an electron
B.
It is a region where an electron is most likely to be found
C.
It is the central part of an atom
D.
It is the complete atom
Correct Answer:
It is a region where an electron is most likely to be found
4. An orbital is best described as a region of space having a high probability of finding:
A.
A proton
B.
A neutron
C.
An electron
D.
A nucleus
Correct Answer:
An electron
5. Which term refers to the three-dimensional region in an atom where an electron is likely to be present?
A.
Orbit
B.
Orbital
C.
Nucleus
D.
Shell number
Correct Answer:
Orbital
6. According to the modern atomic model, an electron in an atom is described by its:
A.
Fixed orbit only
B.
Orbital or probability region
C.
Nuclear radius
D.
Mass number
Correct Answer:
Orbital or probability region
7. What does an orbital show about an electron?
A.
Its exact circular path
B.
The region where it is most likely to be found
C.
Its exact position and speed at every instant
D.
Its number of protons
Correct Answer:
The region where it is most likely to be found
8. Which of the following is not a correct description of an orbital?
A.
A probability region for an electron
B.
A three-dimensional region around the nucleus
C.
A region of high electron probability
D.
A definite circular path followed by an electron
Correct Answer:
A definite circular path followed by an electron
9. The concept of an orbital is based on the probability of finding an:
A.
Electron in a region of space
B.
Electron inside the nucleus only
C.
Atom inside a molecule only
D.
Electron on a fixed line
Correct Answer:
Electron in a region of space
10. An orbital is associated with the movement and location of:
A.
Electrons
B.
Protons only
C.
Neutrons only
D.
Nucleons only
Correct Answer:
Electrons
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