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:
“The atomic bomb certainly is the most powerful of all weapons, but it is conclusively powerful and effective only in the hands of the nation which controls the sky.”
—Lyndon Baines Johnson (1908–1973)
“We commonly say that the rich man can speak the truth, can afford honesty, can afford independence of opinion and action;—and that is the theory of nobility. But it is the rich man in a true sense, that is to say, not the man of large income and large expenditure, but solely the man whose outlay is less than his income and is steadily kept so.”
—Ralph Waldo Emerson (1803–1882)