1. Mg   Silver   Helium   Magnesium   Nitrogen   Hint Half-n-half Clue   2. B   Lithium   Boron   Krypton   Antimony   Half-n-half Clue   3. Co   Beryllium   Cobalt   Tin   Aluminum   Half-n-half Clue   4. Cr   Barium   Chromium   Sulfur   Neon   Half-n-half Clue   5. Au   Silicon   Gold   Nitrogen   Aluminum   Half-n-half Clue   6. Sn   Uranium   Boron   Gold   Tin   Half-n-half Clue   7. U   Uranium   Carbon   Nickel   Xenon   Half-n-half Clue