Atom Timeline

Dalton: Solid Sphere Model

1803

This was the very first model within the discovery of the atom. Dalton claimed in his discovery that the atom was a sphere that could not be divided into particless.

Thompson: The Plum Pudding Model

1904

This model showed that an atom had a positive charged medium and/or a space with negatively charged electrons

Rutherford: The Nuclear Model

1911

This model determines that all of the mass of the atom, are located in the nucleus at the center of the atom.

Bohr: The Bohr (Planetary) Model

1913

Showed that the negatively charged electrons orbit a small, positively charged nucleus

Schrodinger: Quantum Mechanics Model

1926

Explains that Electrons have an intrinsic property called spin, and an electron can have one of two possible spin values: spin-up or spin-down.