# Problem: The work function of an element is the energy required to remove an electron from the surface of the solid element. The work function for lithium is 279.7 kJ/mol (that is, it takes 279.7 kJ of energy to remove 1 mole of electrons from 1 mole of Li atoms on the surface of Li metal; 1 mol Li 5 6.022 x 1023 atoms Li). What is the maximum wavelength of light that can remove an electron from an atom on the surface of lithium metal?

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###### Problem Details

The work function of an element is the energy required to remove an electron from the surface of the solid element. The work function for lithium is 279.7 kJ/mol (that is, it takes 279.7 kJ of energy to remove 1 mole of electrons from 1 mole of Li atoms on the surface of Li metal; 1 mol Li 5 6.022 x 1023 atoms Li). What is the maximum wavelength of light that can remove an electron from an atom on the surface of lithium metal?