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AP EAMCET201824 Apr 2018Morning ShiftPhysicsAtomic PhysicsActual

The approximate value of principal quantum number for a circular orbit of hydrogen atom of radius 530 ~nm is

Options

  1. A26
  2. B100
  3. C200
  4. D21

Correct answer

B. 100

Step-by-step solution

Radius of electron of hydrogen in n^ th orbit, aligned & r_n=n^2 0.53 Å & 530 ~nm =n^2 0.053 Å & 530 10⁻⁹ ~m =n^2 0.53 10⁻¹⁰ ~m & n^2= 5300 0.53 & n^2=10^4 & n=100 & aligned

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