History of the Atom + Gold Foil experiment

What did Democritus discover?

The atom

What did Aristole propose?

He proposed that there are 4 basic elements

What did John Dalton create?

Billard Ball model

What did J.J Tomson create and discover?

Plum Pudding model & the electron

What did Ernest Rutherford discover and do?

The Nucleus and the Proton and the Gold Foil experiment

What did Niels Bohr discover?

Electron Orbits

What did James Chadwick discover?

The Neutron

What is fired at the gold foil?

A stream of tiny positively charged particles

How thick is gold foil?

2000 atoms

What do most charged "bullets" do?

Pass through the gold atoms in the sheet without changing course

What do the rest of the charged "bullets" do?

Bounce away from the gold sheet

What do positive charges do to other positive charges?

Repel