1. Cr   Bromine   Uranium   Silicon   Chromium   Hint Half-n-half Clue   2. Be   Tin   Iodine   Gold   Beryllium   Half-n-half Clue   3. Au   Mercury   Gold   Cobalt   Iridium   Half-n-half Clue   4. He   Barium   Calcium   Gold   Helium   Half-n-half Clue   5. Ar   Boron   Argon   Beryllium   Copper   Half-n-half Clue   6. Co   Copper   Nickel   Cobalt   Aluminum   Half-n-half Clue   7. Cu   Sodium   Copper   Iron   Platinum   Half-n-half Clue