1.

An electron in the n = 1 orbit of hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in the n = 3 state, how much energy is required to ionize it                              [MP PMT 1995]

A. 13.6 eV
B. 4.53 eV
C. 3.4 eV
D. 1.51 eV
Answer» E.


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