aug 17, 340 BC - Aristotle
Aristotle was a famous philosopher who disregarded Democritus' idea, and instead believed that there were four elements: earth, fire, & water.
His model is as shown: http://www.chemistryland.com/CHM130S/03-BuildingBlocks/Chaos/4elements.jpg
There was no specific date for when Aristotle created his model.
Added to timeline:
Atomic Model Timeline (click on the names)
science lab assignment