ave an approximate value for Avogadro's number by observations of brownian motion. Cannizarro later used Avogadro's hypothesis to develop a set of atomic weights based on 116 of the weight of oxygen. This was a basis for finding much more accurate estimates for Avogadro's number. Reasonable values were made in the late 1800's from sedimentation equilibrium of colloidal particles. Millikan's oil drop experiment in the 1900's gave even more accuracy and was cited in most chemistry text books 50 years ago. Text books in 1958 gave Avogadro's number as 6.02 x10 to the 23rd. The current value is 6.0221367x10 to the 23rd power. Amedeo Avogadro proved to be one of the greatest scientists to ever live. If it had not been for Avogadro and his findings there is no way that Chemistry in general would be where it is today. Avogadro's work was recognized nearly fifty years after he had made his hypothesis. Two years after his death, his colleague showed how they could use Avogadro's number to solve many of the problems in chemistry. Avogadro's work also helped other scientists to solve more problems and develop more theories.Bibliography:Asimov, Isaac, A Short History of Chemistry (1965; repr. 1979); Morselli, Mario, Amadeo Avogadro (1984);-Partington, J. R., A History of Chemistry, vol. 4 (1964)Atomic Masses and Fundamental Constants (1980);Rossini, F. D., Fundamental Measures and Constants for Science and Technology (1974) Type in your essay topic or author and click Search! in 1796 by obtaining a doctorate in law and practicing as a lawyer for three years after. In 1800, he began to take private lessons in mathematics and physics and decided to make the natural sciences his profession. He was appointed as a demonstrator at the Academy of Turin in1806 and the Professor of Natural Philosophy at the College of Vercelli in 1809, and in 1820, he was appointed the professor of mathematical physics. He was a physics professor but he also experimente...
