1. In an electron-density diagram, darker shading usually represents:
A.
Higher electron density
B.
Lower nuclear charge
C.
Greater electron mass
D.
A faster electron
Correct Answer:
Higher electron density
2. In an electron-density diagram, a lighter region generally represents:
A.
Lower electron density
B.
Higher electron density
C.
A second nucleus
D.
A region of greater electron charge
Correct Answer:
Lower electron density
3. The boundary surface drawn for an orbital usually encloses a region containing:
A.
A high probability of finding the electron
B.
No electron density
C.
The entire atom with certainty
D.
Only the nucleus
Correct Answer:
A high probability of finding the electron
4. The boundary surface of an orbital represents:
A.
An exact physical wall for the electron
B.
A chosen surface enclosing a large probability of electron presence
C.
The path followed by the electron
D.
The outer surface of the nucleus
Correct Answer:
A chosen surface enclosing a large probability of electron presence
5. Which statement best describes the electron-density cloud of an orbital?
A.
It shows how electron probability is distributed in space
B.
It shows the exact route of the electron
C.
It shows the shape of the nucleus
D.
It shows the electron's fixed position
Correct Answer:
It shows how electron probability is distributed in space
6. At a point where the wave function is zero, the electron density is:
A.
Zero
B.
One
C.
Maximum
D.
Infinite
Correct Answer:
Zero
7. If the magnitude of the wave function at one point is larger than at another point, electron density is generally:
A.
Greater at the first point
B.
Greater at the second point
C.
Zero at both points
D.
The same at both points
Correct Answer:
Greater at the first point
8. Which orbital has zero electron density at the nucleus because of a nodal plane passing through it?
A.
1s orbital
B.
2s orbital
C.
2p orbital
D.
3s orbital
Correct Answer:
2p orbital
9. A radial node is a region at a particular distance from the nucleus where:
A.
Electron density is zero
B.
Electron density is always maximum
C.
The nucleus becomes larger
D.
The electron remains permanently
Correct Answer:
Electron density is zero
10. Which statement correctly compares electron density and probability of finding an electron?
A.
Electron density helps determine the probability of finding an electron in a small region
B.
Electron density and probability are unrelated
C.
Electron density gives the electron's exact path
D.
Electron density is the same as electron speed
Correct Answer:
Electron density helps determine the probability of finding an electron in a small region
Short questions are currently unavailable for this page.