1. What does electron density at a point in an orbital represent?
A.
The probability of finding an electron near that point
B.
The mass of the electron at that point
C.
The speed of the electron at that point
D.
The charge of the nucleus at that point
Correct Answer:
The probability of finding an electron near that point
2. In which region of an orbital is the electron density generally greatest?
A.
A region where the probability of finding the electron is highest
B.
A region farthest from the nucleus only
C.
A region where the nucleus is absent
D.
A region with no electron probability
Correct Answer:
A region where the probability of finding the electron is highest
3. Which quantity is commonly related to electron density?
A.
The square of the wave function
B.
The square of the atomic mass
C.
The nuclear mass number
D.
The atomic temperature
Correct Answer:
The square of the wave function
4. What does a high electron density in a region indicate?
A.
A high probability of finding the electron there
B.
A high speed of the electron there
C.
A high nuclear charge there
D.
A high mass of the electron there
Correct Answer:
A high probability of finding the electron there
5. What does zero electron density at a point indicate?
A.
The probability of finding the electron at that point is zero
B.
The electron has maximum speed at that point
C.
The nucleus has zero charge
D.
The electron has maximum mass at that point
Correct Answer:
The probability of finding the electron at that point is zero
6. Which statement best describes an orbital using electron density?
A.
It is a region where the probability of finding an electron is significant
B.
It is the exact circular path followed by an electron
C.
It is the path of the nucleus around the electron
D.
It is a region containing only the nucleus
Correct Answer:
It is a region where the probability of finding an electron is significant
7. If electron density is represented by |ψ|², what happens when ψ is zero?
A.
Electron density is zero
B.
Electron density is maximum
C.
Electron density becomes negative
D.
Electron density becomes equal to the nuclear charge
Correct Answer:
Electron density is zero
8. Which region is more likely to contain an electron?
A.
A region with greater electron density
B.
A region with zero electron density
C.
A region outside all orbitals
D.
A region with no probability
Correct Answer:
A region with greater electron density
9. What is the electron density at a nodal surface?
A.
Zero
B.
Very high
C.
Equal to the nuclear density
D.
Equal to the electron mass
Correct Answer:
Zero
10. Which statement about electron density is correct?
A.
It can vary from one region of an orbital to another
B.
It is the same at every point in every orbital
C.
It is always zero inside an orbital
D.
It represents the electron's exact path
Correct Answer:
It can vary from one region of an orbital to another
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