Thought all matter was made up of the elements: earth, air, water, and fire.

• Democritus

• Ernest Rutherford

• John Dalton

• Aristotle

• J.J. Thomson

Gold Foil Experiment

• Neils Bohr

• Democritus

• John Dalton

• Ernest Rutherford

• JJ Thomson

Cathode Ray Tube Experiment

• Neils Bohr

• Democritus

• John Dalton

• Ernest Rutherford

• JJ Thomson

First person to suggest the idea of the atom.

• Democritus

• Ernest Rutherford

• John Dalton

• Aristotle

• J.J. Thomson

His work discovered atoms have a nucleus, positive protons, and electrons that travel around nucleus

• Neils Bohr

• Democritus

• John Dalton

• Ernest Rutherford

• JJ Thomson

This contains most of the mass of an atom

• Electron Cloud
• Nucleus
• Electron

This particle is found in the nucleus and has a positive charge

• Electron
• Proton
• Neutron

This particle is found in the nucleus and has no charge

• Neutron
• Proton
• Electron

This is a negatively charged particle found outside the nucleus

• Electron
• Proton
• Neutron

All matter is made of what?

• energy 
• atoms 
• electrons 
• compounds