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AP EAMCET202021 Sep 2020Evening ShiftChemistryStructure of AtomActual

The electronic configuration of ( Cs ) is

Options

  1. A([ Kr ] 5 ~s ^1 )
  2. B([ Xe ] 6 ~s ^1 )
  3. C([ Rn ] 7 ~s ^1 )
  4. D([ Ar ] 4 ~s ^1 )

Correct answer

B. ([ Xe ] 6 ~s ^1 )

Step-by-step solution

Caesium atomic number is 55. Thus, electron configuration of caesium is (1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2 3 d¹⁰ 4 p^6 5 s^2 4 d¹⁰ 5 p^6 6 s^1 ) or [Xe] (6 s^1 ). Hence, correct option is (b).

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