jul 8, 460 BC - Democritus
Description:
atomic theory posited that all matter is made up small indestructible units he called atoms.stated that matter consists of invisible particles called atoms and a void (empty space).
stated all atoms differ in size, shape, mass, position and arrangement, with a void exists between them.
Added to timeline:
Date:
jul 8, 460 BC
Now
~ 2487 years ago