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If the potential energy of an electron in the hydrogen atom is -3.02eV, then, in which of the following excitation level is the electron present?

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Important Questions on Structure of Atom

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The ionisation energy of a H-atom is 13.6 eV. The energy required to excite the electron from its ground state to the next higher state will be: (in eV)
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The energy of an electron in an excited H-atom is -1.51 eV. Angular momentum of the electron in the given orbit will be:
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The ionisation energy of H atom is 13.6 eV. The ionisation energy of Li2+ ion will be
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If the binding energy of 3rd  orbit of a H-like species is 13.6 eV, then the species must be:
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In which excited state can a hydrogen atom sample already in the ground state can reach, when it is bombarded with photons of energy 12.75 eV
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If the binding energy of first excited state of a hydrogen like sample is 54.4 eV, then determine the atomic number, Z of the H-like species.
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The excitation energy of first excited state of a hydrogen-like atom is 40.8 eV. The energy needed to remove the electron from ground state of the ion is:
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Match the following

a Energy of ground state of He+ i +6.04eV
b Potential energy of I orbit of H-atom ii -27.2eV
c Kinetic energy of II excited state of He iii 54.4 V
d lonisation potential of He+ iv -54.4eV