"Ionization energy" is the amount of energy required to remove an electron from an isolated atom. For a hydrogen atom, composed of an orbiting electron bound to a nucleus of one proton, how much ionization energy is required to force the electron from its lowest energy level entirely out of the atom?
A 136 eV
B 13.6 eV
C 1.36 Joule
D 0.136 Joule
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