1. Give the n, l, and all of the ml quantum numbers for the first allowed g orbital. Sketch the radial wave function as a function of distance from the nucleus. How many radial and angular nodes are found for this orbital?
2. Find the electron configuration and ground state term symbol for a) Co; b) Co2+; c) Cl; d) Cl–; e) La; f) Cu; g) Cr.
3. A periodic property not discussed in class is the absolute hardness, η, defined as η = (IP-EA)/2. Calculate η (in units of eV) for the elements Li to F. What is the general trend across this row of elements? How does the trend in η compare to the trend in Z*?
4. In fluorite, CaF2, the calcium ions form the lattice and the fluoride ions occupy tetrahedral holes. Why is this unusual? Would you expect this to be a closest packed lattice, in the sense that the calcium ions are "touching"? Why or why not?
5. The experimental lattice energies are 912 kJ/mol for AgCl and 750 kJ/mol for NaCl. The two solids have identical structures (both are rock salt) and the cationic radii for Ag+ and Na+ are identical, 0.102 nm for octahedral holes. Explain why the lattice energies are so different despite the fact the two compounds have identical structures.