Developments of particle model

By AWASL
  • 460 BCE

    Democritus

    Democritus
    Democritus was an Greek philosopher and was born in Abrade (though other sources cite Milieus) who, with his teacher Leucippus, was the first to propose an atomic universe.
  • 460 BCE

    Aristotle

    Aristotle
    Ancient Greek philosopher Aristotle was born circa 384 B.C. in Stagira. He hypothesized that matters has a continuous composition

  • John Dalton

    John Dalton
    Chemist John Dalton was born September 6, 1766, in Eagles field, England. He suggested that matter is made up of small discrete particles.

  • Robert Brown

    Robert Brown
    Robert Brown was born in Mont rose, Scotland—the son of an Episcopalian minister. Observed that some dead pollen grains suspended in water were constantly moving about randomly in all directions.

  • Albert Einstein

    Albert Einstein
    Albert Einstein was on born 14 March 1879 – 18 April 1955)He was a German-born theoretical physicist. He explained that dead pollen grains were moving because they were being bombarded by the moving water particles.