Question

The names of the sub-shells present in M shell (n= 3) are

• A. 2s, 2p, 2d
• B. 3s, 3p, 3d
• C. 3p, 3d, 3f
• D. 4s, 4p, 4d, 4f

Answer 1

The Correct Option is B

The names of the sub-shells present in M shell (n = 3) are 3s, 3p, 3d.

✅ Correct answer: 3s, 3p, 3d 

Explanation: For a given principal quantum number n, the possible sub-shells are determined by the azimuthal quantum number l, which can take values from 0 to (n − 1).
So, for n = 3:
→ l = 0 → 3s
→ l = 1 → 3p
→ l = 2 → 3d
Hence, the sub-shells are 3s, 3p, and 3d.

Answer 2

The correct answer is 3s, 3p, 3d. In the M shell (n = 3), the sub-shells present are 3s, 3p, and 3d. The M shell corresponds to the principal quantum number n = 3, and it can have sub-shells corresponding to l = 0 (s), l = 1 (p), and l = 2 (d). Thus, the sub-shells present in the M shell (n = 3) are 3s, 3p, 3d.