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Question: As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state o...

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.

A

1.51

B

13.6

C

40.8

D

122.4

Answer

122.4

Explanation

Solution

E=−Z2×13.6 6mueV=−9×13.6 6mueV=−122.4 6mueVE = - Z^{2} \times 13.6\mspace{6mu} eV = - 9 \times 13.6\mspace{6mu} eV = - 122.4\mspace{6mu} eV

So ionisation energy = + 122.4 eV.