Wavelength of electromagnetic radiation

babbagee

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

thunderfvck

[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

babbagee

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.