ATOMIC THEORY

DEMOCRITUS

ATOMOS

• All of Earths materials
• Are made up of tiny
• Particles called atoms

ARISTOTLE

EARTH WIND FIRE WATER

• Things aren't made of atoms
• They're made up of the
• Four basic elements

DALTON

BILLIARD BALL MODEL

• Atoms are much like
• Billiard balls
• solid and round and
• Not much to it

J.J.THOMSOM

PLUM PUDDING MODEL

• Atom is big with stuff in it
• Atom is pudding
• Neutrons and protons are plums
• Also did cathode ray experiment

MILLIKAN

MASS/CHARGE OF ELECTRON

• The mass and charge of electrons
• Also did oil drop expirament
• Longest expirament in history

CHADWICK

PROTON/NEUTRON MODEL

• Proof of the structural
• Relationship between
• Protons and neutrons

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