Unit 1.5 Atomic Theory
The development of early models of the atom is discussed,
beginning with atomism 400 B.C., to models of Greek philosophers,
to Daltons first atomic theory.
Video program cues: 31:40-33:40
The early understanding of the atom
- A timeline of atomic
theory from Democritus to the 1950s with links
to important scientists and discoveries.
History of the atomic theory
"[Democritus:] Everything was composed of
atoms, which moved randomly in a vacuum, in a void. They
collided into each other by chance. This was the absolute
negation of Aristotle's idea that everything had a purpose
as divinely ordained [the theory of the Four Elements]."
Dr. Hugh Salzburg
Giunta, C.J. (2001) 'Using History to Teach Scientific Method:
The Role of Errors', 'Journal of Chemical Education, Vol.
78, No. 5, pp: 623-627.
Leary, J.J. and Kippeny, T.C. (1999) A Framework for
Presenting the Modern Atom, 'Journal of Chemical Education,
Vol. 76, No. 9, pp: 1217-1218.
to Unit 1.6