Timeline of the development of the atomic models
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John Dalton (1803) proposed the billiard ball model of the atom with positively charged particles in a solid sphere. Ernest Rutherford (1911) discovered the nuclear model through gold foil experiments, finding a small, dense nucleus at the center. Niels Bohr (1913) incorporated the planetary model with electrons in energy levels around the nucleus. James Chadwick (1932) discovered the neutron in the nucleus, completing the modern atomic model. Eugene Goldstein discovered protons in 1885. Robert Millikan discovered the charge of an electron in 1910.
Timeline of the development of the atomic models
- 1. TIMELINE OF THE DEVELOPMENT OF THE ATOMIC MODELS I. Complete the timeline below by drawing the correct atomic model in this box: , writing the name of the scientist in this box: , and indicating the name of the model inside this shape: Choices: CHALLENGE! Add the following in your timeline by writing the name of the scientist and the year of discovery. Write it in th correct place in the timeline. II. Complete the diagram below to describe the latest atomic model. Joseph John Thomson John Dalton Neils Bohr Ernest Rutherford James Chadwick Werner Heisenberg and Erwin Schrodinger Nuclear Model Planetary Model/Energy Levels Electron Cloud/Quantum Mechanical Model Billiard Ball/Solid Sphere Model Atom with Neutrons in the Nucleus Plum Pudding/Bread and Raisin Model Eugene Goldstein (1885)- discovered PROTONS. Robert Millikan (1910) -discovered the charge of an electron which is 1.60217662 10-19 coulombs