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AIIMS2002ChemistryStructure of Atom

Which of the following does not have valence electron in 3 d -subshell?

Options

  1. AFe (III)
  2. BCr (I)
  3. CMn (II)
  4. DP (0)

Correct answer

D. P (0)

Step-by-step solution

Phosphorus (P) has electronic configuration 1 s^2, 2 s^2, 2 p^ 6, 3 s^ 2, 3 p^3 Therefore, no valence electron is present in the 3 d subshell. Fe (III) has electronic configuration : aligned & 3 d^5 4 s^0 & Cr ( I ): 3 d^5 4 s^0 & Mn ( II ): 3 d^5 4 s^0 aligned

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