[Billthedrill]

Dmitri Ivanovitch Mendeleev. That periodic table? Consider that there was no such thing as atomic theory when he did it. Mind-boggling.

[Billthedrill]

I should clarify that. There was no such thing as theory of atomic structure when Mendeleev did his work. 1864.

[Scoutmaster]

And Dmitri Ivanovitch Mendeleev didn’t win the Nobel Prize.

[Holdem Or Foldem]

Five main points of Dalton's atomic theory Elements are made of extremely small particles called atoms. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed. Atoms of different elements combine in simple whole-number ratios to form chemical compounds. In chemical reactions, atoms are combined, separated, or rearranged.Various atoms and molecules as depicted in John Dalton's A New System of Chemical Philosophy (1808)