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1. |
What is the energy required to ionize an H-atom from the third excited state, if ground state ionization energy of H-atom is 13.6 eV? |
A. | 1.5 eV |
B. | 3.4 eV |
C. | 13.6 eV |
D. | 12.1 eV |
Answer» B. 3.4 eV | |