science and atomic theory

science and atomic theory

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  • The History of the Atomic Theory
  • Greek Model of the Atom
  • The Greek Model of the Atom (400BC) Created by Democritus All of matter composed of atoms
  • Billiard Ball Model
  • The Billiard Ball Model (1803 AD) Atoms cannot be destroyed Created by John Dalton Compares an atom to a billiard ball
  • By Chiara and Naomi
  • Plum Pudding Model
  • Plum Pudding Model (1897 AD) Composed of positively charged mass with electrons scattered Created by JJ Thompson, later proved wrong ;(
  • The idea that all matter is made up of tiny invisible particles, or atoms. The word atom comes from the word atomos, which means invisible.
  • Planetary Model
  • Planetary Model (1911 AD) The model is similar to the solar system. Created by Ernest Rutherford Later became a failed model ;( commonly used as a symbol of atom
  • Dalton thought atoms were the smallest particles of matter. He envisioned them as solids, hard spheres, like billiard balls. So, he used wooden balls to model them.
  • Bohr's Atomic Model
  • Bohr's Atomic Model (1913) Orbital Similar to the planetary model Created by Niels Bohr Later proven to be obselete 
  • Like negatively charged plums surrounded by positively charged pudding. It was disproved by Hans Geiger's and Ernest Marsden's 1909 gold foil experiment.
  • The model described the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all the mass is concentrated, around which the light, negative constituents called electrons circulate at some distance, much like planets revolving around the sun.
  • This depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits that travel around the nucleus, similar to the structure of the solar system.
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