1. An atomic orbital is associated with a region around the:
A.
Nucleus
B.
Electron only
C.
Neutron outside the atom
D.
Chemical vessel
Correct Answer:
Nucleus
2. Which option describes the location of an electron in terms of an orbital?
A.
The electron may be found in a probable region around the nucleus
B.
The electron always moves on one exact circle
C.
The electron is always inside the nucleus
D.
The electron has no location in an atom
Correct Answer:
The electron may be found in a probable region around the nucleus
3. What does the term electron cloud commonly represent?
A.
The region around the nucleus where an electron is likely to be found
B.
A cloud of protons inside the nucleus
C.
The fixed path of a neutron
D.
The outer surface of the atom only
Correct Answer:
The region around the nucleus where an electron is likely to be found
4. Which statement is true about an orbital?
A.
It represents a possible region for an electron
B.
It represents a proton's path around the nucleus
C.
It represents the nucleus alone
D.
It represents the total mass of an atom
Correct Answer:
It represents a possible region for an electron
5. If an electron is described by an orbital, the orbital tells us mainly:
A.
Where the electron is likely to be found
B.
The exact line along which it travels
C.
The number of neutrons in the atom
D.
The chemical name of the element
Correct Answer:
Where the electron is likely to be found
6. What is an atomic orbital?
A.
A fixed circular path followed by an electron
B.
A region around the nucleus where the probability of finding an electron is high
C.
The complete atom including its nucleus and electrons
D.
A straight line joining the nucleus and an electron
Correct Answer:
A region around the nucleus where the probability of finding an electron is high
Explanation:
An atomic orbital is a three-dimensional region around the nucleus where there is a high probability of finding an electron.
7. Which statement correctly defines an orbital?
A.
It is the exact position of an electron at a particular instant
B.
It is a region of space associated with a high probability of finding an electron
C.
It is the path of an electron around the nucleus
D.
It is the nucleus of an atom
Correct Answer:
It is a region of space associated with a high probability of finding an electron
Explanation:
An orbital does not give an exact electron path; it represents a region where the electron is most likely to be found.
8. An orbital represents the probability of finding:
A.
A proton inside the nucleus
B.
A neutron outside the nucleus
C.
An electron around the nucleus
D.
The nucleus outside the atom
Correct Answer:
An electron around the nucleus
Explanation:
The concept of an orbital is used to describe the probable location of an electron around the nucleus.
9. Which of the following is not a correct description of an orbital?
A.
A region of high electron probability
B.
A three-dimensional region around the nucleus
C.
A definite circular path of an electron
D.
A region in which an electron is likely to be found
Correct Answer:
A definite circular path of an electron
Explanation:
An orbital is a probability region, not a definite circular path followed by an electron.
10. The shape of an orbital indicates:
A.
The exact route of an electron
B.
The region in which an electron is likely to be found
C.
The number of protons in the nucleus
D.
The mass of the atom
Correct Answer:
The region in which an electron is likely to be found
Explanation:
The shape of an orbital describes the spatial region where the probability of finding an electron is significant.
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