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Jan 1, 1000
chemistry in the prehistory.
The human discovers the fire. The control of fire by early humans was a turning point in the cultural aspect of human evolution that allowed humans to cook food and obtain warmth and protection. Making fire also allowed the expansion of human activity into the dark and colder hours of the night, and provided protection from predators and insects -
Jan 2, 1000
Ancient History chemistry
Arguably the first chemical reaction used in a controlled manner was fire. However, for millennia fire was seen simply as a mystical force that could transform one substance into another (burning wood, or boiling water) while producing heat and light. Fire affected many aspects of early societies. These ranged from the simplest facets of everyday life, such as cooking and habitat lighting, to more advanced technologies, such as pottery, bricks, and melting of metals to make tools. -
Jan 3, 1000
Alchemy
Alchemy is a philosophical and protoscientific tradition practiced throughout Europe, Egypt and Asia. It aimed to purify, mature, and perfect certain objects.[1][2][n 1] Common aims were chrysopoeia, the transmutation of "base metals" (e.g., lead) into "noble" ones (particularly gold); the creation of an elixir of immortality; the creation of panaceas able to cure any disease; and the development of an alkahest, a universal solvent. -
Jan 4, 1000
The Scientific Renaissance
It was characterized mainly by the return of classical Greek thought of antiquity. observation and experimentation : Then this two elements that before were not taken into account and that both would become essential added . From this moment, the Chemistry passes as genuine science. -
Jan 5, 1000
iatrochemistry
is a branch of both chemistry and medicine. " Having its roots in alchemy, iatrochemistry seeks to provide chemical solutions to diseases and medical ailments.
. Its most notable leader was Paracelsus, an important Swiss alchemist of the 16th century. -
Jan 7, 1000
phlogiston theory
The theory of phlogiston , a hypothetical substance that represents flammability, is an obsolete scientific theory according to which any substance capable of having combustion contains phlogiston , and the combustion process is basically the decay of the substance. It was first postulated in 1667 by the alchemist Johann Becher German physicist ( 1635-1682 ) to explain the chemical process of combustion and was defended by fellow physician and chemist Georg Stahl -
Jan 8, 1000
Dalton's Atomic Theory
The atomic hypothesis John Dalton (1766-1844) was formulated in the early nineteenth century and marked the beginning of systematic calculation of atomic weights for all elements . Thus , they could explain the laws of combination established over the years. -
Jan 8, 1000
Mendeleev Periodic Table
The discovery of a large number of elements and the study of their properties yielded immediate results : there were relationships between some of them , especially in their similar chemical behavior. This led scientists to seek a classification of elements.
