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Question
The diagram above represents the energy states for a particular atom.Photons having which of the following energies could be absorbed by atoms of this kind in the ground state? Assume that the absorbed electrons do not ionize the atom.
The diagram above represents the energy states for a particular atom.Photons having which of the following energies could be absorbed by atoms of this kind in the ground state? Assume that the absorbed electrons do not ionize the atom.
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Solution
The correct option is C 5 eV
Only the photons having the energy equal to the difference in the energies of the two states are absorbed by the atom.Energy of the ground state (n=1), E1=−11 eVFrom figure, energy difference between n=2 and n=1: ΔE=E2−E1=−6−(−11)=5 eVThus, photon of energy (5eV) is absorbed by the atom.
Only the photons having the energy equal to the difference in the energies of the two states are absorbed by the atom.
Energy of the ground state (n=1), E1=−11 eV
From figure, energy difference between n=2 and n=1: ΔE=E2−E1=−6−(−11)=5 eV
Thus, photon of energy (5eV) is absorbed by the atom.
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