1. Penicillin   Sir Humphry Davy   Sir J. J. Thompson   Johan Kepler   Alexander Fleming   Hint Half-n-half Clue   2. Aluminium   Sir Humphry Davy   Neels H. D. Bohr   Hans Christian   Enrico Fermi   Half-n-half Clue   3. Hydrogen   Michael Faraday   Henry Cavendish   Hans Christian   Gregor Mendel   Half-n-half Clue   4. Potassium   Ronald Ross   Henry Cavendish   Sir Fredrick Grant Banting   Sir Humphry Davy   Half-n-half Clue   5. Laws of Gravitation   Sir Isaac Newton   Ronald Ross   Gregor Mendel   Sir J. J. Thompson   Half-n-half Clue   6. Neptunium   Enrico Fermi   Sir Humphry Davy   Charles Darwin   Euclid   Half-n-half Clue   7. Principles of Geometry   Sir J. J. Thompson   Euclid   Henry Cavendish   Albert Einstein   Half-n-half Clue