How to calculate K excitation voltage and Cu K-alpha1 wavelength

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asdf1
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for these problem:
1.calculate the K excitation voltage of copper.
2. calculate the wavelength of the Cu K(alpha 1) line.

my problem:
with that limited amount of information, how are you supposed to calculate it?
 
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You're going to need some tabulated data. http://xdb.lbl.gov/ is the place to get that. For 1. you'll need the binding energy of the K electrons.

For 2.. do you know what transition the K_alpha 1 line is equivalent to? You'll need the relevant energy difference.
 
wow~ thanks! but i think my textbook wants me to calculate it without the data, but is that possible?
 
Calculating the binding energies is not a trivial matter. I really really really doubt that that would be what your textbook wants you to do.