ATOMIC MODEL TIMELINE
Daniel Gutierrez
Created on October 21, 2021
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Transcript
Atomic models
Ernst Rutherford
1909
Erwin SchrödingerLouis de BroglieWerner Hiesenberg
1926
J. J. Thomson
1897
John Dalton
1808
Niels Bohr
1913
Work/Experiment: He took Democritus' idea. Main contributions: - Matter is made up of atoms. - Atoms of the same element are identical.
Work/Experiment: The one with gold foil and alpha particles. Main contributions: - Atom is mostly empty space with electrons around. - Atom has a nucleus with positive particles (protons).
Work/Experiment: Hydrogen emission spectrum Main contributions: - Electrons absorb energy to jump to another level and when they relax emit radiation in the form of a photon. - Electrons are located in specific energy levels.
Work/Experiment: Set of complex mathematical expressions to predict the location of the electron Main contributions: - Predictions of the atomic orbital. - Sublevels of energy (s, p, d, f).
Work/Experiment: Cathode rays tube Main contributions: - Electrons' discovery.