1. Sodium   Wilhelm K. Roentgen   Johan Kepler   Christian Barnard   Sir Humphry Davy   Hint Half-n-half Clue   2. Blood Circulation   Sir Fredrick Grant Banting   Albert Einstein   Louis Pasteur   William Harvey   Half-n-half Clue   3. Theory of Evolution   Enrico Fermi   Sir Fredrick Grant Banting   Charles Darwin   Sir J. J. Thompson   Half-n-half Clue   4. Modern Theory of Atomic Structure   Sigmund Freud   Neels H. D. Bohr   Sir J. J. Thompson   Sir Humphry Davy   Half-n-half Clue   5. Hydrogen   Karl Wilheim Scheele   Henry Cavendish   Louis Pasteur   Wilhelm K. Roentgen   Half-n-half Clue   6. X-rays   Neels H. D. Bohr   Michael Faraday   Wilhelm K. Roentgen   Ronald Ross   Half-n-half Clue   7. Electron   Sir J. J. Thompson   Sir Fredrick Grant Banting   Sir Humphry Davy   Wilhelm K. Roentgen   Half-n-half Clue