# Chemistry help

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=5.091 A˚. What is the maximum wavelength (in meters) of radiation capable of ionizing sulfur and producing this effect?

If you look up the first ionisation energy of sulphur then you can solve the second part of this problem. The first ionisation energy for sulphur is: ![999.6 text{ kJ}](http://chart.apis.google.com/chart?cht=tx&chf=bg,s,FFFFFF00&chl=999.6++%5Ctext%7B+kJ%7D "999.6 text{ kJ}")
helen.watson
21 November 2012
If you look up the first ionisation energy of sulphur then you can solve the second part of this problem. The first ionisation energy for sulphur is: Or Using: Where is
helen.watson
21 November 2012
So: (Hertz)
helen.watson
21 November 2012
We can calculate the wavelength using: Where is
helen.watson
21 November 2012
Meaning our wavelength is:
helen.watson
21 November 2012