Register to reply 
Wavelength of electromagnetic radiation 
Share this thread: 
#1
Jan2504, 06:41 PM

P: 74

Calculate the longest wavelength of electromagnetic radiation that could ionize an atom of each of the following elements:
a) Li; IE_{1}=520.1 kJ/mol can some one tell me the steps to do this problem. thanks 


#2
Jan2504, 07:31 PM

P: 210

[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 


#3
Jan2604, 08:34 PM

P: 74

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. 


Register to reply 
Related Discussions  
Wavelength of an Electromagnetic wave  General Physics  4  
Electromagnetic radiation  Introductory Physics Homework  2  
Electromagnetic radiation  Introductory Physics Homework  5  
Electromagnetic radiation  General Physics  5  
Electromagnetic radiation  Quantum Physics  1 