Name:_____________
Chemistry 112
Final Exam (Non-Comprehensive Part)
Remember- Show all work for partial credit.
2 points for your name. All problems are worth 14 points. You may skip one question from
the non-comprehensive part of this test (if you do all 8 questions I will throw out the worst
one.)
1. Give the electron configurations of the following atoms or ions
Fe3+
K
Cl-
2. Order the following atoms by their periodic properties
Atomic radius
Ge, As, Sn
Largest ____________________Smallest
Ionization energy
Sr, Se, Ne
Largest ____________________Smallest
least exothermic to most exothermic electron affinity
Al, Si, P
Least______________________Most
Electronegativity
B, O, Ga
Most electronegative _____________________________Least electronegative
3. Name four ions that are isoelectric with Ar. Give these ions in order of increasing size
Smallest ___________________________________ Largest
2
3
4. Which compounds will have the most polar X-H bonds:
H-P, H-S or H-Cl
Most Polar Bonds ______________________________________ Least Polar Bonds
5. Write the chemical reaction that corresponds to:
ionization energy
sublimation energy
electron affinity
lattice energy
6. We in writing Lewis structures we have discovered compounds with single, double and triple bonds.
How are these bonds different or similar? How many electron regions do you allocate to a double bond
in the VSEPR model.
4
7. Give the Lewis structure, electron geometry, molecular geometry and bond angles for the following
three compounds:
HCN
RnCl2
ICl4-
8. Find 2 non-equivalent Lewis structures for PO43- and use formal charge to determine which is the
better structure.