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AP EAMCET201923 Apr 2019Morning ShiftChemistryStructure of AtomActual

If the electronic configuration of (M³⁺ ) is [Xe] (4 f^3 ), then (M³⁺ ) is

Options

  1. A( Nd ³⁺ )
  2. B( Pr ³⁺ )
  3. C( Sm ³⁺ )
  4. D( Dy ³⁺ )

Correct answer

A. ( Nd ³⁺ )

Step-by-step solution

Given, the electronic configuration of (M³⁺ ) is [Xe] (4 ^3 ). The electronic configuration of metals given in options in ( M ³⁺ ) are as follows: (a) ( Nd ³⁺=[ Xe ] 4 f^3 ) (b) ( Pr ³⁺=[ Xe ] 4 f^2 ) (c) ( Sm ³⁺=[ Xe ] 4 f^5 ) (d) ( Dy ³⁺=[ Xe ] 4 f^9 ) Thus, (M³⁺ ) among the given options will be ( Nd ³⁺ ).

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