The atomic theory

• A Greek philosopher and scientist who lived on the south coast of Sicily between 492 BCE and 432 BCE

  Empedocles
• "All matter was composed of four elements: fire, air, water, and earth"
• He proposed the first theories that all matter was composed of four elements
• He cut the stone in half and turn into smaller pieces into smaller pieces at some point he reached a piece so tiny it could no longer be divided

  Democritus
• What does atomos mean?

  Indivisible
• he suggested that Atomos were eternal and could not be destroyed


  Democritus
• They rejected the theory of Democritus and accepted the theory of Empedocles


  Plato and Aristotle
• Aristotle didn't believe in the theory of atoms because it would be putting a restriction on the gods
• He added a fifth element which is "Aether"


  Aristotle
• Dark matter consist of?

  90%