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April 1, 2024
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Atomic History Timeline
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Обновлено 26 окт 2017
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Created by
Jessie Wallin
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Democritus - He discovered the atom - Was known to be first one to call them atoms
Aristotle - Believed that Democritus was wrong - The world was made up of 4 elements
Lavoisier - Breakthrough with studying chemical reactions - Created the Law of Conservation of Mass
Dalton - said matter was made up of atoms - atoms of certain elements have the same in every way
My Birth
My Parents' Birth
Columbus's Voyage
Sinking of the Titanic
End of World War I
End of the Civil War
End of Revolutionary War
End of World War II
Avogadro - simple gases were formed of compound molecules of two or more atoms - oxygen had split into two atoms in the course of forming water vapor
Berzelius - rejected Dalton's symbols for elements - found atomic weights of 45 elements in lifetime
Thomson - founded the electron - thought atoms were made up of positive charges to balance out negative ones
M. Curie - founded radium and polonium - first woman in France to achieve professorial rank
Planck - created Planck's radiation law - formula that related the energy of the radiation to its frequency
Millikan - determined the unit charge of the electron - formed a formula that calculates the mass of the electron and the positively charged atoms
Bohr - Said electrons in atoms orbit the nucleus - The laws of classical mechanic applied to the motion of electrons
Moseley - created Moseley's law - found the three unknown elements between aluminum and gold
Rutherford - discovered the proton - discovered the possible existence of the eutron
Heisenberg - founded the Uncertainty Principle - electrons surround the outside of an atomic nucleus in the electron cloud
Schrodinger - developed model for electron cloud - mathematically determined the regions where electrons would most likely be found
Chadwick - first to talk about neutrons - created the model we use today
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