1. I   Zinc   Iodine   Bromine   Uranium   Hint Half-n-half Clue   2. Mg   Iridium   Zinc   Magnesium   Helium   Half-n-half Clue   3. Ir   Manganese   Iodine   Iridium   Cadmium   Half-n-half Clue   4. Cd   Cadmium   Neon   Tungsten   Phosphorus   Half-n-half Clue   5. Kr   Hydrogen   Phosphorus   Potassium   Krypton   Half-n-half Clue   6. Cr   Chromium   Cobalt   Cadmium   Fluorine   Half-n-half Clue   7. S   Fluorine   Sulfur   Gold   Cadmium   Half-n-half Clue