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AIIMS2016ChemistryClassification of Elements and Periodicity in Properties

An element (X) belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer electronic configuration of (X) ? It has

Options

  1. Apartially filled d orbitals and completely filled s orbital
  2. Bcompletely filled s orbital and completely filled p orbitals
  3. Ccompletely filled s orbital and half-filled p orbitals
  4. Dhalf-filled d orbitals and completely filled s orbital.

Correct answer

C. completely filled s orbital and half-filled p orbitals

Step-by-step solution

The electronic configuration of (X) can be written as X=1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2 3 d¹⁰ 4 p^3 So, element (X) has completely filled s and d orbitals and half filled p orbitals.

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