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Homework Help: Remove electron from gaseous atom

  1. Oct 13, 2008 #1
    What wavelength of light would be required to remove an electron from a gaseous atom of tin?

    Here, I used Plank's constant h as 6.62*10-34 J.s and Constant c as 3*108 m/s

    Also, energy needed to remove an electron is calculated by [tex]\Delta[/tex]E =hc/[tex]\lambda[/tex]

    I also used Broglie Eqn: [tex]\lambda[/tex] = h/mv

    The mass of Sn is 118.710 g. --> 0.11871 kg What is the mass of an electron of tin?

    Can I use Broglie's Eqn and state that the wavelength required is:
    6.62*10-34 J.s / ((0.11871 kg)*(3*108 m/s))

    =1.86*10-41 m

    This doesn't seem right. Please help.
  2. jcsd
  3. Oct 13, 2008 #2


    User Avatar

    Staff: Mentor

    Masses are irrelevant, you will need ionisation energy.

    No idea what you mean by "electron of tin". All electrons are identical.
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