Quimica Atomo

History of atomic theory

The concept of atoms existed since ancient Greece proposed by Greek philosophers Democritus, Leucippus, and Epicurus, however, the concept was not generated throughexperimentation but as a philosophical necessity to explain the reality, since, as proposed by these thinkers The matter could not divide indefinitely, so there should be a unit or block indivisible andindestructible that when combined in different ways macroscopic bodies created all around us. In 1773 the French chemist Antoine-Laurent Lavoisier ran his statement: "Matter is neither created nordestroyed, merely transformed." Later shown by the experiments of English chemist John Dalton who in 1804, after measuring the mass of reactants and products of a reaction, and concluded that thesubstances are composed of identical spherical atoms for each element, but different from one element to another.

Then in 1811, Amedeo Avogadro, Italian physicist, postulated that a temperature, pressureand volume given, a gas containing the same number of particles. The Russian chemist Dmitri Ivanovich Mendeleev in 1869 created a classification of chemical elements in order of increasing atomicmass, remarking that there was a periodicity in the chemical properties. This work was the forerunner of the periodic table of elements as we know it today.

The modern view of its internal structurehad to wait until Rutherford's experiment in 1911 and the Bohr model. Subsequent discoveries such as quantum theory and technological developments such as the electron microscope, have allowed learningin greater detail the physical and chemical properties of atoms.

Historia de la teoría atómica

El concepto de átomo existe desde la Antigua Grecia propuesto por los filósofos griegosDemócrito, Leucipo y Epicuro, sin embargo, no se generó el concepto por medio de la experimentación sino como una necesidad filosófica que explicara la realidad, ya que, como proponían estos pensadores, la...