ATOMIC HISTORY

DEMOCRITUS

• Thought that particles could eventually not be cut

DEMOCRITUS

• Atomos-not able to be divided

JOHN DALTON

• everything is made of atoms
• atoms are unique
• everything is made up of 2 or more atoms
• atoms do move to form compounds

Untitled Slide

J.J. THOMSON

•  Discovered particles in atoms

Plum Pudding

ERNEST RUTHERFORD

• discovered where and if the particles moved 

Untitled Slide

• the atom has a nucleus 

NIELS BOHR

• Thought the amount of energy to move atoms is finite

Untitled Slide

MODERN THEORY

• Erwin Schrodinger
• Werner Heisenberg

ELECTRON CLOUD

• describes where the electrons are when they rotate