CHEM 10052 Lecture Notes - Lecture 3: The Sceptical Chymist, Bohr Model, Vacuum Tube
18 Dec 2018
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400 b. c: democritus, matter made of small particles atomos . If you found some way to divide this smallest part the matter would change into something else: aristotle, matter made of 4 elements, matter is continuous and could be infinitely divided without losing its properties. There was not smallest part of a piece of matter: what"s in the empty space, a particulate viewpoint implied that there must be empty space even in solid matter. The early greeks would not accept that empty space could be part of solid matter: alchemy: 400 b. c. Atoms of different elements have different numbers of protons (post-dalton: chemical compounds are formed by combinations of atoms in small whole number ratios to form molecules, chemical reactions involve the rearrangement of atoms into new combinations. New atoms are not produced in chemical reactions: dalton"s legacy, dalton"s work completes chemical revolution began by boyle. The physical sciences were now firmly rooted in the particulate model of matter.
