Question

what is the ionisation energy of unexcited hydrogen atom???

Answer 1

In the present case the electron is in an excited state. So depending on the excited state the electron is in, the ionization energy will be 3.4 eV or less. The ionisation energy of a hydrogen atom is 2.179x10-18 J. What is the second IE of the hydrogen atom? Ionisation energy of a hydrogen atom is 13.6eV
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