jan 1, 1808 - John Dalton
Description:
Dalton's also proposed that all matter was composed of atoms that were indivisible and unbreakable building blocks. He also Proposed that all atoms of an element were identical, but different elements had atoms of differing size and mass. He found that all matter was comprised of atoms.Added to timeline:
Date:
jan 1, 1808
Now
~ 217 years ago