Who is luccipus?

What did democritis contribute to the atomic therory?

Democritus was a pupil of Luccipus, and perhaps according to both of them and certainly according to Democritus, the atom was the irreducibleminimal quantity of matter. The concept of the infinite divisibility of matter was flatly contradicted by the atomic theory, since within the interior of the atom there could be no physical parts or unoccupiedspace. Every atom was exactly like every other atom as a piece of corporeal stuff. But the atoms differed in shape, and since their contours showed an infinite variety and could be oriented in any direction and arranged in any order, the atoms could enter into countless combinations. In their solid interior there was no motion, while they themselves could move about in empty space. Thus, for the atomic theory, the physical universe had two basic ingredients: impenetrableatoms and penetrable space. For Democritus, space was infinite in extent, and the atoms were infinite in number.