Model of the atom

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    Democritus

    Democritus
    born:460B.C, died in 370BC
    more info: This is Democritus' atomic theory exactly: 1.All matter consists of invisible particles called atoms.
    1. Atoms are indestructible.
    2. Atoms are solid but invisible.
    3. Atoms are homogenous.
    4. Atoms differ in size, shape, mass, position, and arrangement.
    ->Solids are made of small, pointy atoms. ->Liquids are made of large, round atoms. ->Oils are made of very fine, small atoms that can easily slip past each other

  • Jonh Dalton

    Jonh Dalton
    born 1766,died 1844
    more info:Dalton's Atomic Theory 1) All matter is made of atoms. Atoms are indivisible and indestructible. 2) All atoms of a given element are identical in mass and properties 3) Compounds are formed by a combination of two or more different kinds of atoms. 4) A chemical reaction is a rearrangement of atoms.

  • JJ Thompson

    JJ Thompson
    born dec. 18 1856, died aug. 30 1940

  • Niels Bohr

    Niels Bohr
    Born: October 7, 1885, Copenhagen, Denmark,Died: November 18, 1962, Copenhagen, Denmark.