Which set of quantum numbers is not allowed?
Correct answer: D. n=2,l=2,m1=1,ms=-1/2
- A. n=2,l=1,m1=0,ms=+1/2
- B. n=2,l=1,m1=-1,ms=+1/2
- C. n=2,l=0,m1=0,ms=-1/2
- D. n=2,l=2,m1=1,ms=-1/2
Explanation
For n = 2, the azimuthal quantum number l can only be 0 or 1, so l = 2 is not allowed; option d is therefore invalid. The likely mistake is choosing c because m1 is written as zero, but m1 = 0 is valid for an s orbital when l = 0.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Quantum Numbers
Quantum numbers describe an electron's energy level, subshell, orbital orientation and spin. You examine the principal, azimuthal, magnetic and spin quantum numbers, their allowed values, orbital capacity and how they determine electronic configurations and distinguish electrons within an atom.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Quantum Numbers questions
Quantum numbers are __________ ?
Which of the following is not the name of any scientist?
Which set of quantum numbers is not allowed for an electron?
Azimuthal quantum number defines___________?
Magnetic quantum number specifies___________?
Quantum number which tells the energy of electron is________________?