Atom Timeline By gruichha 440 BCE Democritus Atomic Model 440 BCE Democritus 1803 John Dalton 1803 John Dalton Atomic Model 1897 J.J. Thomson 1897 J.J. Thomson Atomic Model 1911 Ernest Rutherford 1911 Ernest Rutherford Atomic Model 1926 Niels Bohr 1926 Niels Bohr Atomic Model 1956 Erwin Schrodinger & Werner Heisenberg 1956 Erwin Schrodinger & Werner Heisenberg Atomic Model
