6h 39min, dec 31, 1807 y - John Dalton
Description:
John Dalton created the first atomic theory he had 4 statements1 Atoms are tiny, invisible particles.
2 Atoms of one element are all the same
3 Atoms of one element are all the same
4 Compounds form by combining atoms
Added to timeline:
Date:
6h 39min, dec 31, 1807 y
Now
~ 216 years ago
