Atomic Theory
The Atomic Model Timeline
- The idea of what an atom is has changed over time.
- Different scientists and their discoveries have led to the development of the current model of an atom.
- Other examples include:
- The solar system (BIG made SMALL)
- The biological cell (SMALL made BIG)
The Democritus Model
- A Greek philosopher
- He conceived the idea of the atom to describe matter.
- Atom comes from the word atomos which means "indivisible".
- He believed that matter was finite (had a limit)
- He believed the smallest piece of matter was an indestructible and indivisible particle which he called the "atom".
The John Dalton Model
J.J. Thompson: The Plum Pudding Model
Read more about this topic: Outline Of Chemistry
Famous quotes containing the words atomic and/or theory:
“One has to look out for engineers—they begin with sewing machines and end up with the atomic bomb.”
—Marcel Pagnol (1895–1974)
“Everything to which we concede existence is a posit from the standpoint of a description of the theory-building process, and simultaneously real from the standpoint of the theory that is being built. Nor let us look down on the standpoint of the theory as make-believe; for we can never do better than occupy the standpoint of some theory or other, the best we can muster at the time.”
—Willard Van Orman Quine (b. 1908)