1. Fe   Bromine   Cadmium   Iron   Oxygen   Hint Half-n-half Clue   2. Mn   Iridium   Manganese   Chlorine   Sodium   Half-n-half Clue   3. Pb   Oxygen   Lead   Iridium   Fluorine   Half-n-half Clue   4. Kr   Krypton   Nitrogen   Zinc   Beryllium   Half-n-half Clue   5. Ag   Aluminum   Silver   Xenon   Chromium   Half-n-half Clue   6. Os   Chlorine   Manganese   Osmium   Beryllium   Half-n-half Clue   7. F   Argon   Krypton   Fluorine   Iodine   Half-n-half Clue