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History: atomic models


Since antiquity, man has been questioned what's texture was made 400 years before Christ, the Greek philosopher Demo criíto considered that the matter was made up of tiny particles that could not be divided into smaller ones. Therefore, these particles called atoms, which in Greek means "indivisible." Demo criíto attributed to atoms the qualities of being eternal and immutable ideas indivisibles.Sin Demo But criíto on the subject were not accepted by the philosophers of his time and had to spend about 2200 years for the idea of \u200b\u200batoms was taken into consideration again .


















Evolution History of atomic models:

History atomic model begins many centuries ago, even before Christ, in the V century, the Greek philosophers wondered whether the matter could be divided into as many particles up to a point where they no longer could be divided again, ie it was indivisible. Demo criíto is how does a theory which states that matter consists of indivisible particles, these particles call them atoms. The Greek word atom means indivisible.

Empedocles, another Greek philosopher, who believed in this theory and posited the idea that matter was composed of 4 elements which combined together. According to him, life was only possible where there was water: a flower without water will die, thus being the first element water. But I get to thinking that water is not solid, but is out of hand. A mountain can not be formed of water and needs, therefore, another element that gives consistency, consistency. The land was the second element of speaking, then, according to him, giving consistency to the water. However, the mud that resulted from this mixture of these was very soft. Therefore believed that the one giving hardness was a third element, air, dry or evaporated as water containing things. Finally, consider the fire as 4 th item.

then a lapse in the history of Chemical, where the main concern is trying to turn base metals into gold known. The scientists responsible for these processes were called alchemists. It was never the goal of these scientists.

With the advent of experimental science in the sixteenth and seventeenth centuries, advances in all liquids, gases and solids can be decomposed into its basic components, or elements. For example, it was discovered that the salt is composed of two different elements, sodium and chloride, linked in an intimate union known as chemical. The air, however, proved to be a mixture of nitrogen and oxygen gases

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