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Find out the minimum energy required to take out the only one electron from the ground state of Li^+?

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in Physics – Class 12 by (135k points)
Find out the minimum energy required to take out the only one electron from the ground state of Li^+?

(a) 13.6 eV

(b) 122.4 eV

(c) 25.3 eV

(d) 67.9 eV

I have been asked this question by my college director while I was bunking the class.

Asked question is from Atomic Spectra topic in portion Atoms of Physics – Class 12

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Correct option is (b) 122.4 eV

The explanation is: Ionization energy is given as:

E = 13.6 Z^2 eV

For Li^+, Z = 3

E = 13.6 × 9

E = 122.4 eV

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