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Jan 1, 600
Thales Of Miletus
Thales was the first person to wonder what matter was made of and how it existed in the first place, he discovered electricity but didn’t connect it with the atom. -
Period: Jan 1, 600 to
I appologise for some of the wrong times but TimeToast dosnt have times BCE and some dates are unknown
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Feb 1, 700
Aristotle
Aristotle created the belief that all matter was made up from only four elements; Water, Earth, Fire and Air. He also theorized that each of these elements had two of four qualities, Fire was Hot and Dry, Earth was Cold and Dry, Water was Wet and Cold and Air was Hot and Wet. He also believed that there was a fifth element called Aether which was the divine and heavenly element. -
Jan 1, 710
Democritus
Democritus came up with the idea that there must be a point where you cant break something in half anymore, he believed that there was a one, smallest point of matter where it can no longer shrink, he called them Atoms. But the famous philosopher Aristotle dismissed the idea, saying it was ridiculous, the rest of the scientific community agreed. -
Robert Boyle
From his studies, Robert believed that everything in the world was made up of many different elements and not just four like Aristotle believed or three like how Paracelsian believed. He also learnt from his studies of gas that the gas was made up of millions of tiny particles. -
Antoine Lavoisier
Antoine Lavoisier was the person who created the first Periodic Table Of The Elements, he discovered elements like oxygen and sulfur, he also discovered that water was made of Hydrogen and Oxygen, thus being the first person to learn about the difference between elements and compounds. -
John Dalton
John Dalton was a chemist who discovered by experimenting with chemicals, that all matter in the world did in fact seem to consist of strange tiny particles. -
Marie Curie
After studying Henri Becquerel's work on radioactivity, she discovered that radioactive rays came from the elements structure in the atomic level. She and her husband Pierre discovered the radioactive elements Polonium and Radium. -
Henri Becquerel
Henri was the first man to discover radioactivity and its effects on the world, he also discovered that radiation is a property that some elements have and some don’t. -
J.J Thompson
J.J Thompson discovered electrons and figured out a model that he believed was the structure of an atom, it looked kinda like raisins stuck on pudding (its actually called the Raisin In The Pudding model) -
Ernest Rutherford
Ernest discovered that there are actually different types of Radiation, and that these types of Radiation were actually identical to certain parts of certain atoms. -
Robert A. Millikan
Robert discovered the electric charge of an electrons using a method he called the “falling drop method” he also proved that this charge was the same with all other electrons, he thus improved our knowledge on electricity and the Atom. -
Niels Bohr
By introducing the concept of Quantum Theory into the idea of the atom, Niels created a new and more realistic picture of what the atom looks like. He also explained why different atoms behave differently. -
Erwin Schrödinger
Unsatisfied by the Copenhagen interpretation of Quantum physics and mechanics, he proposed The Schrödinger’s Cat problem, which (besides horrify cat lovers) explained the strangeness and complexity of life when looked at through Quantum mechanics, he basically improved our knowledge of the Atom and Quantum mechanics. -
Werner Heisenberg
Werner helped developed the idea of quantum physics, he also theorized that there were neutrons in the nucleus of an atom, he created a new model for the atom and thus the model was changed once more. -
James Chadwick
After studying Werner Heisenberg’s work and doing several tests, James proved that Neutrons actually exist in atoms, using this tool he led to the discovery of Nuclear Fission and the creation of the Atomic Bomb. -
Bibliography
All information in this Timetoast, i got from...
http://www.iep.utm.edu/thales/http://www.nobeliefs.com/atom.htm
http://www.universetoday.com/62400/aristotle-atomic-theory/
http://www.nobeliefs.com/atom.htm
http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/early-chemistry-and-gases/boyle.aspxhttp://scienceworld.wolfram.com/biography/Lavoisier.html
http://www.nobeliefs.com/atom.htm -
Bibliography 2
http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/the-path-to-the-periodic-table/dalton.aspx
http://www.nobelprize.org/nobel_prizes/physics/laureates/1903/becquerel-bio.htmlhttp://www.nobelprize.org/nobel_prizes/physics/laureates/1906/thomson-bio.html
http://www.biography.com/people/marie-curie-9263538 http://www.biography.com/people/ernest-rutherford-39099
http://www.nobelprize.org/nobel_prizes/physics/laureates/1922/bohr.html -
Bibliography 3
http://www.nobelprize.org/nobel_prizes/physics/laureates/1922/bohr.html
http://www.nobelprize.org/nobel_prizes/physics/laureates/1923/millikan.html http://www.nobelprize.org/nobel_prizes/physics/laureates/1933/schrodinger.html
http://curiosity.discovery.com/question/schrodinger-cat-quantum-physics
http://www.nobelprize.org/nobel_prizes/physics/laureates/1932/heisenberg.html http://www.nobelprize.org/nobel_prizes/physics/laureates/1935/chadwick.html
