1. Aluminium   Wilhelm K. Roentgen   Christian Barnard   Sir Humphry Davy   Hans Christian   Hint Half-n-half Clue   2. Neptunium   Sigmund Freud   Enrico Fermi   Henry Cavendish   Ronald Ross   Half-n-half Clue   3. Sodium   Sir Humphry Davy   Henry Cavendish   Hans Christian   Sir Isaac Newton   Half-n-half Clue   4. Hydrogen   Sir Humphry Davy   Michael Faraday   Henry Cavendish   Karl Wilheim Scheele   Half-n-half Clue   5. Potassium   Louis Pasteur   Sir Humphry Davy   Ronald Ross   Sir Isaac Newton   Half-n-half Clue   6. Blood Circulation   Louis Pasteur   William Harvey   Sir Humphry Davy   Neels H. D. Bohr   Half-n-half Clue   7. Bacteria   Anton Von Leeuwenhock   Sir J. J. Thompson   Hans Christian   Albert Einstein   Half-n-half Clue