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JEE Main202120 Jul 2021Evening ShiftChemistryStructure of AtomActual

Outermost electronic configuration of a group 13 element, E , is 4 s 2 , 4 p 1 . The electronic configuration of an element of p-block period-five placed diagonally to element, E is:

Options

  1. A[ Kr ] 3   d 10 4   s 2 4 p 2
  2. B[ Ar ] 3   d 10 4   s 2 4 p 2
  3. C[ Xe ] 5   d 10 6   s 2 6 p 2
  4. D[ Kr ] 4   d 10 5   s 2 5 p 2

Correct answer

D. [ Kr ] 4   d 10 5   s 2 5 p 2

Step-by-step solution

The element E is Ga and the diagonal element of 5 th  period is Sn 50 having outer electronic configuration will be [ Kr ] 5   s 2 4   d 10 5 p 2 .

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