Atomic Models Overview

Front

Proposed the idea of indivisible atoms

Back

Democritus

Front

John Dalton

Back

Developed the first atomic theory in the 1800s

Front

Discovered the electron, proposed the "plum pudding" model

Back

J.J. Thomson

Front

Ernest Rutherford

Back

Conducted the gold foil experiment, discovered the nucleus

Front

Proposed electrons orbit the nucleus in fixed paths

Back

Niels Bohr

Front

Describes electrons in terms of probabilities, not fixed paths

Back

Quantum Mechanical Model

Front

Electrons embedded in a positive sphere

Back

Plum Pudding Model

Front

Atom mostly empty space, dense nucleus

Back

Rutherford Model

Front

Electrons in quantized orbits around nucleus

Back

Bohr Model

Front

Schrödinger

Back

Developed wave equation for electron behavior