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NEETChemistryStructure of Atom

For a particular subshell, the total number of permissible values of the magnetic quantum number is 7. If the number of radial nodes for this subshell is 2, the correct designation of the subshell is:

Options

  1. A5f
  2. B4f
  3. C6f
  4. D5d

Correct answer

C. 6f

Step-by-step solution

The total number of permissible values of the magnetic quantum number for a subshell is given by 2l + 1 . Given that 2l + 1 = 7 , we find 2l = 6 l = 3 . An azimuthal quantum number of l = 3 corresponds to an f subshell. The formula for the number of radial nodes is n - l - 1 . Given that the number of radial nodes is 2, we can substitute l = 3 into the formula: n - 3 - 1 = 2 n - 4 = 2 n = 6 Therefore, the principal quantum number is n = 6 and the subshell is 6f . Option 1 is incorrect because it corresponds to n-l

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