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liation of wavelength 300 surface of sodium, electrons are Jmol 2 = 1.804 x 10 m 118. When electromagnetic radiation of waveleng nm falls on the surface of sodium, electro emitted with a kinetic energy of 1.68 x 10 What is the minimum energy needed to remo an electron from sodium? What is the maximum wavelength that will cause a photo-electron to be emitted? (h = 6.626 x 10-"Js)

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