1. Pt   Platinum   Cobalt   Chlorine   Magnesium   Hint Half-n-half Clue   2. Al   Copper   Chromium   Potassium   Aluminum   Half-n-half Clue   3. Mn   Calcium   Xenon   Sodium   Manganese   Half-n-half Clue   4. Mg   Uranium   Tungsten   Magnesium   Boron   Half-n-half Clue   5. Cl   Helium   Potassium   Chlorine   Tungsten   Half-n-half Clue   6. I   Iodine   Lead   Carbon   Tin   Half-n-half Clue   7. H   Sulfur   Xenon   Cadmium   Hydrogen   Half-n-half Clue