The number of orbitals associated with quantum number n = 5, ms = +\( {1 \over 2} \) is :
Show Hint
- 11
- 25
- 15
- 50
The Correct Option is B
Solution and Explanation
Total orbitals = 1 + 3 + 5 + 7 + 9 = 25 = n2.
The spin quantum number ms = +1/2 does not change the orbital count: every one of these orbitals can hold an electron with ms = +\(\tfrac12\), so 25 orbitals are associated with n = 5, ms = +\(\tfrac12\).
Answer: (B) 25
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