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Atomic Theory - Coggle Diagram
Atomic Theory
400BC
First theory that matter is made up of atoms
Theorized that everything could be broken down into atoms, which were to small to be seen
Democritus
:1803
Dalton came up with the theory that all matter is made up of atoms, that atoms are indestructible and cannot be broken down further, and that all atoms of the same element are the same, but different than atoms of other elements
Dalton's Atomic Theory
1897
Using cathode ray tubes, Thomson discovered the presence of a negatively charged particle, the electron
JJ Thomson
1911
Rutherford shot a beam of alpha particles at a gold sheet, and saw that most particles passed through but some particles bounced back. With this information he theorized that the atom has a central nucleus.
Rutherford
1913
Bohr theorized that the electrons orbit around the nucleus in fixed orbits, by using the different colored light produced by stuff when you zap them with electricity
Bohr Model
1926
Schrodinger theorized that the atoms do not follow fixed orbits but there is an area or cloud that they orbit around the nucleus. He said you can not guess the exact point the electron would be but you can guess the area it would be in
Schrodinger's Cloud Model
