Atoms And Nuclei Question 267

Question: Excitation energy of a hydrogen like ion in its excitation state is 40.8 eV. Energy needed to remove the electron from the ion in ground state is

Options:

A) 54.4 eV

B) 13.6eV

C) 40.8 eV

D) 27.2 eV

Show Answer

Answer:

Correct Answer: A

Solution:

  • Excitation energy ΔE=E2E1=13.6Z2

[112122]

40.8=13.6×34×Z2,=2.

Now required energy to remove the electron from ground state =+13.6Z2(1)2=13.6(Z)2=54.4eV.



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