atomic theory

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    democrictus

    stated that all matter is made up of atoms. He also stated that atoms are eternal and invisible and so small that they can’t be divided

  • lavoisier

    provided the formula for the conservation of matter in chemical reactions,

  • couloumb

    formulated the Coulomb's law, which states that that the force between two electrical charges is proportional to the product of the charges and inversely proportional to the square of the distance between them

  • john dalton

    formed the atomic theory, which states that all matter is composed of tiny, indestructible particles called atoms that are all alike and have the same atomic weight.

  • crookes

    created the Crookes’ tube and demonstrated that cathode rays travel in straight lines and produce phosphorescence and heat when they strike certain materials.

  • thomson

    discovered the electron and developed the plum-pudding model of the atom.

  • ernest rutherford

    used the results of his gold-foil experiment to state that all the mass of an atom were in a small positively-charged ball at the center of the atom.