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460
Democritus model
460b.c.-370b.c. believed the atom was it - smallest particle of matter.I think it's pretty remarkable he was able to develop a good basic concept of atoms to begin with. -
Dalton's Model
Dalton was able to build on Democritus' idea of atoms as the fundamental building block's of matter and go further to say that there were many different "flavors" or kinds of atoms. -
Thompson's model
Thompson is credited with discovering the electron. Imagine bringing two positive poles together, then bringing a positive pole to a negative one. Thompson was studying electrical discharge in a cathode ray tube. Thompson's model basically says that atoms are spheres which has an overall, diffuse positive charge with little negative electrons randomly appearing throughout. Bottom line, no concept of a nucleus just yet. -
Rutherford's model
Rutherford directed the famous Geiger–Marsden experiment in 1909 which suggested, upon Rutherford's 1911 analysis, that the so-called "plum pudding model" of J. J. Thomson of the atom was incorrect. Rutherford's new model for the atom, based on the experimental results, contained the new features of a relatively high central charge concentrated into a very small volume in comparison to the rest of the atom and with this central volume also containing the bulk of the atomic mass of the atom. -
Bohr Mordel
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity. -
Electron Cloud Model
An electron cloud is a visual model of the most probable locations of electrons in an atom. The cloud is denser where you will probably find an electron. The electron cloud model is used to describe the possible locations of electrons around the nucleus. The electron cloud model was developed by Erwin Schrodinger by using matematical equatiuons to describe the motion of electrons in atoms
