1. dic Trends Pre-laboratory work: What common feature exists in the electronic structure of
elements in group 2? How about group 6? Similar to Tro page 339 for group 2, what might be
the common formula for the oxide? For group 6, what would be the common formula for the
chloride? . When Mendeleev first discovered the periodic table, the noble gasses where not
known. How did this discovery alter the periodic table and what key quantum concept does this
emphasize? Find the formulas for the anhydride of each of the following molecules. To obtain
the formula of an anhydride, subtract H20 units from the formula until all hydrogens have been
subtracted. If the molecule has an odd number of hydrogens, double its formula . first. a. H2SO.4
EXAMPLE: Subtracting one H2O unit from H2SO, leaves SO. This is the anhydride for this
acid. Follow this procedure for the remaining acids below
Solution
#2 . General formula for gp 2 oxides = MO (where M is metal of gp 2) .
General formula for gp 6 chloride = MCl2 , where M is the gp 6 metal .