The cache is at North AA EG DHD and West FDC AB DFF.
A = the number of valence electrons of aluminum
B = the oxidation state of a ferrous cation
C = the number of bonds that carbon usually makes
D = the number of valence electrons for most noble gases
E = the number of 3d electrons that manganese has
F = the number of electrons that neon needs to gain to achieve stability
G = the number of protons that carbon has
H = the atomic number of fluorine
All of these answers can be found pretty readily by doing a little chemical research. Enjoy your visit to the periodic table!
New note: The coords will bring you to the top of two sets of old staircases. The cache was hidden in a pipe of the handrail at the top of one; however, the handrail has disappeared. Go to the top of the steps and face the Marietta square. Turn 180 degrees and walk 40 paces.
Congratulations to FTF TurtleCowboy!!
You can check your answers for this puzzle on Geochecker.com. <>P