atomic theory timeline

Timeline created by jda1297
  • 384

    Aristotle BC

    Aristotle BC
    He disagreed with democtrus's idea and thought that atoms could be cut.
  • 440

    democritus bc

    democritus bc
    He is the first to think that atoms are made of a single material that could not be cut.
  • John Dalton

    John Dalton
    He published the first atomic theroy and said #1 all substances are made of atoms wich are tiny particles that can not be created, divide, or destroyed. #2 atoms of the same element are exactly alike. #3 atoms join with other atoms to make new substances.
  • J.J. Thomson

    J.J. Thomson
    he discoverd that there are tiny particles inside the atom and called this the plum pudding model.
  • Period: to

    the developement of the atomic theroy

  • rutherford 1909

    rutherford 1909
    he discoverd that there are charged particles in the part of the atom.
  • rutherford 1911

    rutherford 1911
    he went further and discoverd that there is a nucleus that is positively charged.
  • schrodinger and heisenberg

    schrodinger and heisenberg
    these men further explained that electrons do not travle in definate paths but more in regons called electron clouds.
  • Niels Bohr

    Niels Bohr
    bhor said that electrons move around the nucleus in certin paths, or energy levels.
  • Period: to

    the developemnt of the atomic theory