Name ________________________________________ Date ____________________________ Period ____
PES Worksheet
1. Identify the element whose photoelectron spectrum is shown below.
a.
b.
c.
d.
N
K
Ca
Sc
2. Identify the element whose photoelectron spectrum is shown below.
a.
b.
c.
d.
O
Ca
Ti
Ge
3. Sketch the graph and identify the element that corresponds to each of the simplified photoelectron spectral
data given below.
a. There are peaks at energies of 64.8 and 5.4 eV, corresponding to 2 and 1 electrons, respectively.
b. There are peaks at energies of 3614, 384, 301, 40.9, 24.7, and 4.34 eV, corresponding to 2, 2, 6, 2, 6 and
1 electrons respectively.
c. There are peaks at energies of 4494, 503, 404, 56.4, 33.6, 8.01 and 6.65 eV, corresponding to 2, 2, 6, 2,
6, 1, and 2 electrons respectively.
4. How do the data in the table below support the claim that calcium’s electrons are in 4 shells?
Element
Ionization Energy (MJ/mol)
Ca
390
42.7
34.0
4.65
2.9
0.59
5. A mysterious element was analyzed by photoelectron spectroscopy (PES) and mass spectroscopy (MS). The
spectrograms are shown below.
a. Identify the mysterious element from the spectral data.
b. Explain how the MS supports your identification.
c. Explain how the PES supports your identification.