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MHT CET20242 May 2024Morning ShiftPhysicsAtomic PhysicsActual

In the third orbit of hydrogen atom the energy of an electron ' E '. In the fifth orbit of helium (Z=2) the energy of an electron will be

Options

  1. A25 E 36
  2. B36 E 25
  3. C3 E 5
  4. D5 E 3

Correct answer

B. 36 E 25

Step-by-step solution

E Z ^2 n ^2 aligned E_ H E _ He & = ( Z ^2 )_ H ( n )_ H ^2 ( n )_ He ^2 ( Z ^2 )_ He & = 1 3^2 5^2 2^2 = 25 36 E _ He & = 36 25 E _ H = 36 25 E aligned

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