Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

As per Bohr's model the energy (in eV) required to remove electron from ground state of Li++ (doubly ionised lithium atom) is

Options:

1.51

13.6

40.8

122.4

Correct Answer:

122.4

Explanation:

$ E = 13.6\times \frac{Z^2}{n^2} = 13.6\times 3^2 = 122.4 eV$