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The discover of the fire
The principle of the rule of chemistry (which for some anthropologists coincides with the beginning of modern man) is the domain of fire. There are indications that more than 500,000 years ago in the time of Homo erectus some tribes found this achievement that even today is one of the most importentes technologies. Not only it gave light and warmth at night and helped protect against wild animals. It also allowed the cooked food. -
The time of the metals
After the discover of the fire the metals comes to the human hands. With the fire was discover the creation of the metals becase with this you can do it a form and other things with metal. -
The discover of the Atoms
In this time Aristoteles think that all the things were maked of fire, water, sand and air. Then he discover that all the matter were made of Atoms. So the world think the same as Aristoteles. -
Alchemy
This period consist in the search of the philosopher stone. It says that this stone could transform any metal in gold. In this the human starts to combine a lot of sustance. -
Chemistry
Its start when the human combine the sustance to found the philosopher stone. Then the human discover so many things to size the sustance. And the human sheard for the conduct of the gases. -
Experimental Chemistry
The human found the form to size the combustion of matter. Then Lavoisier discover oxygen and finally laying the cornerstones of modern chemistry. -
Organic Chemistry
After the principles of combustion they understand another debate of great importance seized of chemistry. Vitalism and the essential distinction between organic and inorganic matter. This theory assumed that organic matter could only be produced by living beings attributing this to an inherent vis vitalis in one's life -
The vitalism
This debate was revolutionized when Friedrich Wöhler discovered accidentally as could synthesize urea from ammonium cyanate in 1828 showing that organic matter could be created chemically. However even today rank in organic and inorganic chemistry remains, seized the first essentially carbon compounds and the second of the compounds of the other elements. -
The period table
In 1860 scientists had already discovered 60 different elements and had determined their atomic mass. They noted that some elements had similar chemical properties so they gave a name to each group of similar items. In 1829 the chemical J.W. Döbenreiner organized a classification system in which these elements are grouped in threes called triads. The chemical properties of the elements of a triad were similar and their physical properties varied in an orderly manner with atomic mass. -
Development of the atomic theory
Throughout the nineteenth century chemistry it was divided between the followers of the atomic theory of John Dalton and those who do not like Wilhelm Ostwald and Ernst Mach. The most determined promoters of atomic theory were Amedeo Avogadro, Ludwig Boltzmann and others who made great advances in understanding the behavior of gases. The dispute was finalized with the explanation of Brownian effect by Albert Einstein in 1905 and by the experiments of Jean Perrin about it.
