1. Electron   Sir Humphry Davy   Wilhelm K. Roentgen   Karl Wilheim Scheele   Sir J. J. Thompson   Hint Half-n-half Clue   2. Laws of Electrolysis   Sir Humphry Davy   Charles Darwin   Louis Pasteur   Michael Faraday   Half-n-half Clue   3. Blood Circulation   Charles Darwin   William Harvey   Gregor Mendel   Sir Humphry Davy   Half-n-half Clue   4. Hydrogen   Henry Cavendish   Sir Humphry Davy   Wilhelm K. Roentgen   Gregor Mendel   Half-n-half Clue   5. Calcium   Enrico Fermi   Sir Humphry Davy   Sigmund Freud   Anton Von Leeuwenhock   Half-n-half Clue   6. Laws of Heredity   Gregor Mendel   Ronald Ross   Neels H. D. Bohr   Sir J. J. Thompson   Half-n-half Clue   7. Heart Transplant Surgery   Albert Einstein   Enrico Fermi   Christian Barnard   Henry Cavendish   Half-n-half Clue