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1. |
If the energy of the electron in the 2nd orbit of hydrogen is -3.4 eV, then how much is the energy (in eV) in the 1st orbit? |
A. | -6.8 |
B. | -1.7 |
C. | -13.6 |
D. | -10.2 |
Answer» D. -10.2 | |