https://www.khanacademy.org/science/mh-grade-8-science/x0f256b8de9c7cf34:inside-the-atom/x0f256b8de9c7cf34:atomic-models/a/daltons-atomic-theory-version-2 2021-04-29T07:55:47Z Dalton's atomic theory The postulates of Dalton's atomic theory: which points do we still use today, and what have we learned since Dalton? article