Atoms And Nuclei Question 130

Question: If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of Li++ is [AIEEE 2003]

Options:

A) 122.4 eV

B) 30.6 eV

C) 13.6 eV

D) 3.4 eV

Show Answer

Answer:

Correct Answer: B

Solution:

En=13.6n2×Z2. For first excited state n = 2 and for Li++, z=3 Þ E=13.64×9=30.6 eV



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