1. Dichromate (Cr2O7)   Cr2O7   SCN   ClO   ClO2   Hint Half-n-half Clue   2. Chlorate   BrO2   BrO3   BrO   ClO3   Half-n-half Clue   3. Oxalate   C2O4   ClO2   ClO   BrO4   Half-n-half Clue   4. Permanganate   C2O4   IO2   MnO4   SCN   Half-n-half Clue   5. Acetate   C2H3O2   NO2   SCN   IO   Half-n-half Clue   6. Iodite   S2O3   IO2   PO3   IO3   Half-n-half Clue   7. Bromite   BrO2   BrO3   CNO   BrO   Half-n-half Clue