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An electron is ejected from a Li atom after being struck by a photon with the...

An electron is ejected from a Li atom after being struck by a photon with the energy of 757.8 kJ/mol. If the ejected electron has an energy of 237.6 kJ/mol, calculate the ionization energy for the ejected electron.

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Answer #1

we know

Ionisation energy + Kinetic energy = total energy

therefore

Ionisation energy = total energy - kinetic energy

                                = 757.8 KJ/mol - 237.6 KJ/mol

                                = 520.2KJ/mol

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