Atomic Theories

Atomic Theories

Models have evolved over a long period of time through the work of many scientists

Plum PuddingSmall, negative particlesJJ Thomson

CannonballSolid, indivisible sphereJohn Dalton

Early 1800s

Nuclear ModelSmall, dense, positive nucleusErnest Rutherford

Planetary ModelElectrons move in planetary motionNiels Bohr

Wave-Mechanical ModelElectrons exist in regions of probability based on energyMANY Scientists

1904

History

1950

1911

1913

Current