Atoms And Nuclei Question 117

Question: Energy of the electron in nth orbit of hydrogen atom is given by En=13.6n2eV . The amount of energy needed to transfer electron from first orbit to third orbit is [MH CET 2002; Kerala PMT 2002]

Options:

A) 13.6 eV

B) 3.4 eV

C) 12.09 eV

D) 1.51 eV

Show Answer

Answer:

Correct Answer: C

Solution:

For n=1, E1=13.6(1)2=13.6 eV
and for n = 3, E3=13.6(3)2=1.51 eV

So required energy =E3E1=1.51(13.6)=12.09 eV



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