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JEE Main2014ChemistryStructure of AtomActual

The correct set of four quantum numbers for the valence electrons of rubidium atom Z = 37 is

Options

  1. A5, 0, 0, + 1 2
  2. B5, 1, 0, + 1 2
  3. C5, 1, 1, + 1 2
  4. D5, 0, 1, + 1 2

Correct answer

A. 5, 0, 0, + 1 2

Step-by-step solution

The electronic configuration can be written as, 1 s 2 ,   2 s 2 ,   2 p 6 ,   3 s 2 ,   3 p 6 ,   4 s 2 ,   3 d 10 ,   4 p 6 ,   5 s 1 The outermost electron has i.e., Kr 36 5 s 1 Principal quantum number = 5 Azimuthal quantum number = 0 (corresponds to s) Magnetic quantum number = 0 Spin quantum number = + 1 2 (positive spin)

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