What wavelength, in nm, can strike a metal surface and eject an electron with a kinetic energy of 1.89 × 10^-19 J if the binding energy of the metal is 289 kJ/mol? A) 1.89 × 10^-19 nm B) 2.75 nm C) 189 nm D) 290 nm E) 297 nm

Question

Quizplus · Accepted Answer

The energy of the photon must equal the sum of the binding energy and the kinetic energy of the ejected electron. Convert the binding energy from kJ/mol to J per photon, then use the equation E = hc/λ to find the wavelength.

What Wavelength, in Nm, Can Strike a Metal Surface and Eject