Chemistry Atomic Structure NUMS 2023
PMDC Verified Question 40 of 95
If value of azimuthal quantum number is 2 then total values of magnetic quantum number will be:
A
\( 03 \)
B
\( 05 \)
C
\( 07 \)
D
\( 10 \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: \( 05 \)
Concept: The total number of magnetic quantum number (\( m \)) values indicates how many spatial orientations (orbitals) exist within a given subshell.

Formula: $$ \text{Total values} = 2l + 1 $$

Solution:
  • The azimuthal quantum number is given as \( l = 2 \) (a \( d \)-subshell).
  • Substitute \( l = 2 \) into the formula: \( 2(2) + 1 = 4 + 1 = 5 \).
  • The specific values are: \( -2, -1, 0, +1, +2 \).
  • There are exactly 5 possible values.


Why other options are incorrect: 3 is for \( l=1 \). 7 is for \( l=3 \). 10 is the number of electrons that the subshell can hold, not the number of magnetic orientations.

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