HISTORY OF THE ATOM

DEMOCRITUS

• Born in Greece
• 460bc-370bc
• First to think (and document) about atoms
• "A smallest particle exists, atoms "

DALTON

• Born in England
• 1766-1844
• Formed the Atomic Theory

ATOMIC THEORY

• All matter is made of atoms
• In an element, all atoms are the same
• 2 or more combined atoms are a compound
• A chemical reaction is a rearrangement

THOMSON

• Born in England
• 1856-1940
• Discovered the electron
• Formed the "Plum-Pudding" model

RUTHERFORD

• Born in New Zealand
• 1871-1937
• Used scatter tests to discover nuclues

BOHR

• Born in Denmark
• 1885-1962
• Discovered that electrons stayed in different "shells"
• Each shell holds a certain amount of energy

CHADWICK

• Born in England
• 1891-1974
• Discovered the neutron

HEISENBERG

• Born in Germany
• 1901-1976
• Figured that electrons do not travel in neat patterns

THE END

SOURCES

• Images: Haiku Deck
• Information: https://the-history-of-the-atom.wikispaces.com