# The binding energy of solid copper metal is 448.7 kJ/mol. When Cu metal is illuminated with...

###### Question:

The binding energy of solid copper metal is 448.7 kJ/mol. When Cu metal is illuminated with light of a wavelength exactly one-half of its photoelectric threshold wavelength, what is the kinetic energy of the ejected electrons, in eV? Write the answer to 3 significant digits. If no electrons are ejected, write -1 as the answer.

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