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history chemical

By tito1927
  • 1 BCE

    chemical antiquity

    chemical antiquity
    the humans discover the metal and discover the weapons
  • 1 BCE

    chemical early

    chemical early
    the humans discover the fire and this is the first passed of early
  • 1 BCE

    alchemy

    alchemy
    Alchemy is an ancient proto practice and a philosophical discipline combining elements of chemistry, metallurgy, physics and medicine with astrology, semiotics, mysticism and spiritualism. Alchemy was practiced in Mesopotamia, Ancient Egypt, Persia, Ancient Greece, the Roman Empire, medieval Islamic Caliphate and India, China and Europe until the eighteenth century, a complex diversity of schools and philosophical systems covering the least 2,500 years.
  • 1 BCE

    iatroquimica

    iatroquimica
    to iatrochemistry or yatroquímica is a historical branch of science linking the chemistry and medicine. Taking their bases in alchemy, iatrochemistry sought to find chemical to pathological and physiological processes of the human body explanations, and provide treatments with chemicals. The iatrochemists believed that physiology depended on the balance of body fluids iatrochemistry específicos.La was a medical trend vanguard between the sixteenth and seventeenth centuriest.
  • 1 BCE

    flogisto

    flogisto
    In the late seventeenth and early eighteenth century the phlogiston theory was proposed to try to explain the processes of combustion and oxidation-reduction through loss or transfer, respectively, of a fluid called flogisto.La course theory was first proposed by Johann Becher and developed by Georg Stahl, both German chemists. Becher ran another reform of the theory of the four elements in which only the land and water would be components of materials in different proportions,

  • chemistry as a scientific activity

    chemistry as a scientific activity
    In thermodynamics, the activity is a measure of an "effective concentration" of a species. It arises because the gas molecules in a nonideal solution or interact with each other. The activity has no dimensions. It is made dimensionless using the mole fraction for calculation. The activity depends on the temperature, pressure and composition. For gases, effective partial pressure is often referred to as fugacidad..

  • modern chemistry

    modern chemistry
    The study of the structure and composition, properties and transformation of substances. It is to this that Chemistry is dedicated. Put that way, it may seem a limited company but far from it. Its scope covers everything because everyone known, solid, liquid, gas or plasma is formed by chemical elements or compounds thereof. Including us: the human body is an aggregate of atoms and molecules interact.

  • Today chemistry

    Today chemistry
    presence in our lives and in our welfare, they often do not we stop and really think about their current influence, and the role played in what we are today. Examples of this is surgery, which could not think without anesthetics, or airplanes flying by private gasoline, the colors of our clothes, in buildings without cement in the manufacture of tunnels without the use of explosives, and etc. Surely if suddenly disappear chemistry of our lives, we would be very similar to what we are now, we,