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UPSC 2003: Regarding the atom of a chemical element, the magnetic quantum number refers to
(a)orientation
(b)shape
(c)size
(d)spin
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Not attemptedCorrect Answer: (a) orientation
The magnetic quantum number (mℓ) specifies the orientation of an atomic orbital in space (there are 2ℓ+1 possible orientations for a given subshell). It does not determine the orbital’s shape, size, or the electron’s spin. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Magnetic_quantum_number?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2003 Science & Technology question?▼
The correct answer is option (a): orientation. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2003, GS Paper 1, as Question 98. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.