1. Mn   Hydrogen   Magnesium   Manganese   Osmium   Hint Half-n-half Clue   2. Ar   Hydrogen   Tungsten   Boron   Argon   Half-n-half Clue   3. Na   Sodium   Carbon   Gold   Phosphorus   Half-n-half Clue   4. Os   Lead   Iodine   Helium   Osmium   Half-n-half Clue   5. Co   Cobalt   Tin   Krypton   Mercury   Half-n-half Clue   6. Cu   Platinum   Copper   Tungsten   Krypton   Half-n-half Clue   7. W   Bromine   Tin   Silicon   Tungsten   Half-n-half Clue