The energy levels of a hypothetical one electron atom are shown in the figure above. Find the ionization potential of the atom?
A
11.2eV
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B
13.5eV
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C
15.6eV
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D
12.6eV
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Solution
The correct option is C15.6eV Ionisation potential is the energy required to take the electron from the ground state to infinity (outside the influence of nucleus) IE=E(n=∞)−E(n=1)=15.6eV