Wavelength of electromagnetic radiation

  1. Calculate the longest wavelength of electromagnetic radiation that could ionize an atom of each of the following elements:

    a) Li; IE1=520.1 kJ/mol

    can some one tell me the steps to do this problem.

    thanks
     
  2. jcsd
  3. [tex]E=hv[/tex]


    [tex]v=\frac{c}{\lambda}[/tex]

    so...[tex]\lambda=\frac{hc}{E}[/tex]

    E = energy (IN JOULES, not kJ!!)
    h = 6.626 * 10^-34 J*s
    v = frequency (s^-1)
    c = 3.00 * 10^8 m/s (speed of light)
    [tex]\lambda[/tex] = wavelength
     
    Last edited: Jan 25, 2004
  4. thanks,

    the only thing that was confusing about this problem was the units. I used the exact equation but my units did not work out. I got an answer in m/atom then some one told me that the atom is ignored for some reason.
     
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