Atomic Models

Democritus

Proposed the first idea of atoms

Aristotle

Believed everything is made of a combination of air, earth, fire, or water

Dalton

Introduced the Billiard Ball Model, suggesting atoms are uniform and solid spheres

Becquerel

Discovered radiation

Thomson

Developed the Plum Pudding Model and discovered electrons

Rutherford

Proposed the Nuclear Model and discovered the nucleus

Bohr

Introduced the Planetary Model and discovered electron energy levels

Schrodinger

Developed the Orbital Model and discovered electron orbitals

Chadwick

Revised the Planetary Model and discovered neutrons

Many Scientists

Contributed to the Modern Model, showing protons, neutrons, and electrons are made of smaller parts