1. U   Sulfur   Lead   Uranium   Iodine   Hint Half-n-half Clue   2. Mn   Chlorine   Tin   Mercury   Manganese   Half-n-half Clue   3. I   Cobalt   Mercury   Chlorine   Iodine   Half-n-half Clue   4. Pb   Aluminum   Neon   Lead   Chlorine   Half-n-half Clue   5. Kr   Krypton   Platinum   Lithium   Silver   Half-n-half Clue   6. Zn   Xenon   Zinc   Chlorine   Iron   Half-n-half Clue   7. Al   Aluminum   Antimony   Nitrogen   Tin   Half-n-half Clue