Name:_____________
Chemistry 112
Final Exam
Section I . New Material Each questions worth 20 points- You may NOT skip any
questions from this section.
1. Give the name, symbol, numerical range, and physical meaning of the four quantum
numbers used to describe atomic electron orbitals.
2. Which atom has:
The smaller atomic radius
K or Rb
Sb or Te
The largest ionization energy
Be or Mg
P or S
The least negative electron affinity
P or Cl
Cl or I
Which ion is larger
F- or Na+
Li+ or Mg2+
Which ionic compound has the weaker lattice energy?
NaCl or KBr
KBr or CaBr2
2
3. Define or give chemical equations for the following terms
Lattice Energy
Sublimation
Ionization energy
Bond energy
Second ionization energy
4. Use bond energy values and Lewis structures to estimate the ÄH for the reaction of:
N2 + 3H2 62NH3
Bond energies (kJ/mol)
H-H 432
H=H 800
H/H 1150
N-N 160
N=N 418
N/N 941
N-H 391
N=H 745
3
5 For each compound below give the Lewis Structure, Electron Geometry, Molecular
Geometry and tell if it has polar bonds or is a polar molecule.
Polar
Lewis Structure
e Geometry
Molecular Geometry
Bonds
Molecule
OCl2
IF5
TeF4
SCl2
Section II
Old Material
You may skip TWO question from this section. (All questions worth 20 points. If
you do all 7 questions I will throw out the worst one(s).)