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400
Democritus
Domecritus460-370B.C.
Democritus believed that atoms are physically, but not geometrically, indivisible; between atoms lies empty space -
John Dalton
Dalton1766- 1844 one of the things John believed was that all matter is made of atoms. Atoms are indivisible and indestructible. -
J.J. Thomson
Thomson1856–1940 J.J. believed the atom as a sphere of positive matter in which electrons are positioned by electrostatic forces -
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