1.

The energy of hydrogen atom in its ground state is ? 13.6 eV. The energy of the level corresponding  to the quantum number n is equal 5 is        [KCET (Engg./Med.) 2001]

A.            ? 5.40 eV          
B.            ? 2.72 eV
C.            ? 0.85 eV          
D.            ? 0.54 eV
Answer» E.


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