Atomic Theory Scientists

Watch the video for additional help. Organize the information. Categories won't have the same number of items in each. Click each phrase to open a drop down menu; determine which scientist or theory it represents. John Dalton Billiard Ball Model atoms of same elements are the same and different are different compound formed through chemical reactions that don't change the existing atoms J.J. Thomson Plum Pudding Model negatively charged particles float in a sea of positively charged particles Cathode Ray Tube discovered electrons Ernest Rutherford Nucleus is a small dense center carrying most of the atom's mass nucleus is positively charged Gold Foil Experiment Atom is mostly empty space Niels Bohr Energy Level Model Electron fixed in circular orbit electrons can jump from one level to another Planetary Model Heisenberg developed an uncertainty principle regarding electrons position and momentum Quantum Model involves orbitals, not orbits cloud model Democritus solid atom that which cannot be divided