Structure of the Atom By gfehr 1805 John Dalton Matter is composed of atoms 1904 J.J. Thomson Thomson Model 1904 Hantaro Nagaoka Saturnian Model 1911 Ernest Rutherford Plantary Model 1913 Niels Bohr Bohr Model 1925 Louis De Broglie Particle Wave Duality 1925 Werner Heisenberg Heisenberg Uncertainty Principle 1926 Ernest Schrodinger Schrodinger's Equations