Atoms And Nuclei Question 58

Question: As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is [IIT 1997 Re-Exam; MH CET 2000]

Options:

A) 1.51

B) 13.6

C) 40.8

D) 122.4

Show Answer

Answer:

Correct Answer: D

Solution:

$ E=-Z^{2}\times 13.6\ eV $ $ =-9\times 13.6\ eV=-122.4\ eV $ So ionisation energy = + 122.4 eV.



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