Outline of Chemistry - Atomic Theory

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:

    “When man entered the atomic age, he opened a door into a new world. What we eventually find in that new world, nobody can predict.”
    —Ted Sherdeman. Gordon Douglas. Dr. Medford (Edmund Gwenn)

    “Don’t confuse hypothesis and theory. The former is a possible explanation; the latter, the correct one. The establishment of theory is the very purpose of science.”
    —Martin H. Fischer (1879–1962)