1. S   Iodine   Iron   Iridium   Sulfur   Hint Half-n-half Clue   2. Cd   Krypton   Cadmium   Potassium   Copper   Half-n-half Clue   3. Xe   Silver   Uranium   Xenon   Sulfur   Half-n-half Clue   4. Ni   Uranium   Nitrogen   Nickel   Iridium   Half-n-half Clue   5. Al   Osmium   Iodine   Antimony   Aluminum   Half-n-half Clue   6. Co   Cobalt   Iron   Iodine   Barium   Half-n-half Clue   7. N   Zinc   Helium   Nitrogen   Iodine   Half-n-half Clue