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Atomic Theory - Coggle Diagram
Atomic Theory
Learning Target: I can explain the progression of the atomic theory
Democritus 400 BC
Developed the first atomic theory around 400 BC
Believed matter was made of small indivisible spheres called atoms
Dalton1810
Developed the first complete attempt towards atomic theory
All atoms of given element are identical in mass and properties
All matter is made of atoms that are indivisible
Compounds are made of combinations of two or more different types of atoms
Chemical reactions are a rearrangement of atoms
JJ Thomson 1900
Discovered the electron using cathode ray tubes
Came up with the "plum pudding" model
Rutherford 1911
Discovered the nucleus with his gold foil experiment
Came up with the Planetary model
Bohr 1913
Discovered electrons exist in energy levels by observing atomic spectra
Developed the Bohr model
Schrödinger 1926
Theorized that electron located cannot be accurately predicted as they move mostly at random
Came up with the "electron cloud" model
