1. Kr   Argon   Bromine   Krypton   Tin   Hint Half-n-half Clue   2. Si   Silicon   Magnesium   Silver   Chlorine   Half-n-half Clue   3. Ba   Lead   Iodine   Barium   Antimony   Half-n-half Clue   4. Be   Sodium   Beryllium   Aluminum   Argon   Half-n-half Clue   5. Cr   Carbon   Silver   Chromium   Platinum   Half-n-half Clue   6. Pb   Manganese   Krypton   Lead   Nickel   Half-n-half Clue   7. Al   Aluminum   Gold   Xenon   Uranium   Half-n-half Clue