1. John Dalton 6 September 1766 – 27 July 1844

2. Atomic theory. matter made up of tiny particles. (atoms) Atoms in one element cant be changed to atoms of another. Atoms cant be created or destroyed. Atoms one element diff mass and prop from atoms of another element

3. Atoms – lego same Can be taken apart Built to different things Rearranged

4. Daltons’ Models of Atoms Carbon dioxide, CO 2 Water, H 2 O Methane, CH 4

5. How he helped us Atomic theory helped us now Atomic mass Elements one kind atom Compound different atoms. Some testing methods used still First atom was popular Heavily flawed, not indestructible

6. Questions What did Dalton state matter was made up of? What is one similarity between Lego and Atoms? What is one way Dalton helped us today?