The mass of an electron is 9109 x 10-shy31 kg what will be


The first ionization potential of potassium is 419 kJ/mol. If UV-­?radiation with wavelength ? = 250 nm is used to eject electrons from potassium, the energy of each photon in excess of the ionization potential provides kinetic energy to escaping electrons. The mass of an electron is 9.109 x 10-­?31 kg. What will be the velocity of the escaping electrons under these conditions? What is the de Broglie wavelength of the escaping electrons?

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Chemistry: The mass of an electron is 9109 x 10-shy31 kg what will be
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