Atomic Theory

Timeline created by DAM04
In History
  • Period:
    -460 BCE
    to
    -370 BCE

    Democritus

    He propose matter was not infinitely divisible, he said atoms could not be created or destroyed.He's ideas were not well accepted by other philosophers.
  • Period:
    -384 BCE
    to
    -322 BCE

    Aristotle

    He thought empty space exist. He thought matter is made of earth, fire, air and water
  • Period: to

    Lavoisier

    He was born in France, he work as a scientist, he discovered that mass is conserved in a chemical reaction. He was considered the first scientist and he stablished that matter isn't destruct only change the form.
  • Period: to

    Dalton

    Born on England and work as a teacher in a quicker wording school in Kendal. Dalton took ideas from Democritus and Aristotle and made the first model of atom. It happened the independence of Mexico.
  • Period: to

    Döbereiner

    He was a profesor in the Jena university. He discover the triadas of elements. During these time Napoleon its the emperor of France(1804), also Guerrero was founded(1849).
  • Period: to

    Meyer

    Was a Aleman doctor. He discover the periodic law. During 1830 the paid of external deuda was canceled. During 1830 Fernando VIII gets back to the throne in Spain.
  • Period: to

    Mendeleev

    Was a professor of chemistry. He discovers the periodic law. During 1850 was the Italian unification. In Mexico in 1900 Porfirio Putin service an electrical trenvia.
  • Period: to

    Newlands

    He order the 62 elements that were known at that time by the atomic mass of each element. He was a British Chemist. There was a wave of panic in US (1837). In Mexico there was a centralist form of goberment (1837).
  • Period: to

    Thompson

    Realize the experiment of cathode ray tube and discover that the electrons have negative charges. He was born on England and work as a professor of physics in the social royal society.
  • Period: to

    Plank

    He was born in Germany and he was a scientist. He discovered that energy is emitted from a black body in discrete amounts called quanta.
  • Period: to

    Rutherford

    He was born in New Zealand and was a physic a chemist. He discovered that atom has a nucleus and discover that the nucleus its the only solid part of an atom.He also discover the proton. There was a revolution in Mexico.
  • Period: to

    Bohr

    He was born in Denmark and work as a physic. His model of atom was the first that incorporated quantum theory. World War develop.
  • Period: to

    Moseley

    He discover the atomic number of each element using x rays. He was killed in work war 1. During that time world war start. In Mexico there were several changes.
  • Period: to

    James Chadwick

    He was born in England and he was a professor on the Cambridge University. He prove the existence of neutrons he help for the creation of the atomic bomb.
  • Period: to

    Heisenberg

    Was born in Germany, he said that atom can't be in a determined speed. World War 2 begins.