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Most Important Selected Qs for JEE AdvancedPhysicsAtomic Physics

A particular hydrogen like atom has its ground state binding "energy 122.4 eV . Its is in ground state. Then:

Options

  1. AIts atomic number is 3
  2. BAn electron of 90 eV can excite it.
  3. CAn electron of kinetic energy nearly 91.8 eV can be brought to almost rest by this atom.
  4. DAn electron of kinetic energy 2.6 eV may emerge from the atom when electron of kinetic energy 125 eV collides

Correct answer

D. An electron of kinetic energy 2.6 eV may emerge from the atom when electron of kinetic energy 125 eV collides

Step-by-step solution

122.4=13.6 z ^2 Z =3 E ₁=122.4 ...(i) E ₂=30.6 ...(ii) E₃=13.6 ...(iii) Equation (i)-(iii) : E ₁- E ₃=108.8 Equation (i)-(ii) : E ₁- E ₂=91.8

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