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- 1. Multiple Choice
Which element has the electron configuration 1s22s22p63s23p5?
chlorine
fluorine
sulfur
phosphorus
- 2. Multiple Choice
How many peaks would you see for the PES graph for the element with an electron configuration of 1s22s22p63s1
2
3
4
5
- 3. Multiple Choice
What is the electron configuration for this PES graph?
1s22s22p63s23p2
1s22s22p63s23p1
1s22s22p63s23p3
1s22s22p63s2
- 4. Multiple Choice
Which element is represented by this PES graph?
aluminum
phosphorus
sulfur
silicon
- 5. Multiple Choice
Which element is represented by this PES graph?
argon
potassium
calcium
scandium
- 6. Multiple Choice
Which element is represented by this PES graph?
calcium
potassium
titanium
scandium
- 7. Multiple Choice
The photoelectron spectra above show the energy required to remove a 1s electron from a nitrogen atom and from an oxygen atom. Which of the following statements best accounts for the peak in the upper spectrum being to the right of the peak in the lower spectrum?
Nitrogen atoms have a half-filled p subshell.
There are more electron-electron repulsions in oxygen atoms than in nitrogen atoms.
Electrons in the p subshell of oxygen atoms provide more shielding than electrons in the p sub shell of nitrogen atoms.
Nitrogen atoms have a smaller nuclear charge than oxygen atoms.
- 8. Multiple Choice
A sample containing atoms of C and F was analyze using x-ray photoelectron spectroscopy. The portion of the spectrum showing the 1s peaks for atoms of two elements is shown above. Which of the following correctly identifies the 1s peak for the fluorine atoms and provides an appropriate explanation?
Peak X, because F has a smaller first ionization energy than C has.
Peak X, because F has a greater nuclear charge than C has.
Peak Y, because F is more electronegative than C is.
Peak Y, because F has a smaller atomic radius than C has.
- 9. Multiple Choice
The complete photoelectron spectrum for an element is shown above. Which of the following observations would provide evidence that the spectrum is consistent with the atomic model of the element?
A neutral atom of the element contains exactly two electrons.
The element does not react with other elements to form compounds.
In its compounds, the element tends to form ions with a charge of +1.
In its compounds, the element tends to form ions with a charge of +3.
- 10. Multiple Choice
How many peaks would you expect to see on the PES graph for potassium? (*Hint: write out the electron configuration first.)
5
6
7
8
- 11. Multiple Choice
How many peaks would you expect to see on the PES graph for an ion of potassium? (*Hint: write the electron configuration for the ion potassium usually would form.
5
6
7
8
- 12. Multiple Choice
Researchers from the planet Zorba have discovered an atom with the following electron structure (shown as a shell model). Sketch the photoelectron spectrum that the researchers analyzed to obtain this knowledge of atomic structure.
1s32s12p63s3
1s32s12p43s3
1s22s22p63s23p1
1s22s22p63s2
- 13. Multiple Choice
The photoelectron spectra of the 1s electrons of two isoelectronic species, Ca2+ and Ar, are shown above. Which of the following correctly identifies the species associated with peak X and provides a valid justification?
Ar, because it has completely filled energy levels.
Ar, because its radius is smaller than the radius of Ca2+
Ca2+, because its nuclear mass is greater than that of Ar
Ca2+, because its nucleus has two more protons than the nucleus that Ar has
- 14. Multiple Choice
What is the electron configuration for O2-?
1s22s22p4
1s22s22p2
1s22s22p43s2
1s22s22p6
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