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Atomic Structure Timeline

By jayrock23
  • 460

    Democritus

    Democritus
    developed idea of atoms

  • Dalton's theory

    Dalton's theory
    dalton 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.