History of the Atom Block 2 - Downey.

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Presentation transcript:

History of the Atom Block 2 - Downey

Democritus Said that things in this world were made of “uncuttable” particles called “atomos” Drawing – “Not yet formed. Only the idea of an invisible particle was created.”

Dalton Proposed a model of the atom in which the individual atoms were thought of as tiny solids like balls or marbles Drawing -

Thomson Saw the atom has a positively charged sphere with negative particles (electrons) embedded within Drawing -

Rutherford Saw the atom as mostly empty space with electrons orbiting around a small, dense nucleus Drawing -

Bohr Proposed a model of the atom in which the atom was a positively charged sphere with negatively charged electrons orbiting in specific layers or shells Drawing -

Heisenberg and Schrodinger Created the atomic model that has a positively charged nucleus and a negatively charged cloud of electrons giving the atom its size Drawing -