Binding energy (also called work function), Φ, is the minimum energy needed to eject an electron from a metal surface. When photons with a wavelength of 277 nm strike a magnesium plate, the maximum kinetic energy of the ejected electrons is 5.23x10-20 J. Calculate the binding energy of electrons to the magnesium surface in kJ per electron. Express your answer to 3 significant figures.
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