Practice portal › Atoms › Bohr Model of the Hydrogen Atom
Asked in GSEB Board July 2021 · Energy levels and ionisation
Idea: counting the ground state as n=1, the first, second and third excited states are n=2, 3 and 4.
So the electron is in n=4.
E₄=-(13.6)/(4²)=-(13.6)/(16)=-0.85 eV.
Ionisation takes the electron to n=∞, where its energy is zero.
Energy needed =0-E₄=0.85 eV.
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