Interpretation:
The maximum theoretical number of electrons related to the fifth principal energy level needs to be determined.
Concept introduction:
The
- Principle quantum number
- Azimuthal quantum number
- Magnetic quantum number
- Spin quantum number

Answer to Problem 5STP
Correct answer: Option D. is correct.
Explanation of Solution
Reason for correct option: The fifth shell or fifth energy level will have:
- 5 s = maximum 2 electrons
- 5p = maximum 6 electrons
- 5d = maximum 10 electrons
- 5f = maximum 14 electrons
Thus total 2+6+10+14 = 32 electrons can be occupied in 5th principle energy level.
Reasons for incorrect options: The maximum number of electrons in an energy level must be sum of electrons in all sub-levels. Therefore it should be 32 electrons only.
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