Atomic Theory And Atoms by Kathleen Stockman

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Atomic Theory And Atoms

Published on Nov 18, 2015

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PRESENTATION OUTLINE

ATOMIC THEORY AND ATOMS

BY: KATHLEEN STOCKMAN, ETHAN ARNOLD, AND DIEGO ORTIZ

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DEMOCRITUS

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ATOMIC HYPOTHESIS
The theory of Democritus and Leucippus held that everything is composed of "atoms", which are physically, but not geometrically, indivisible; that between atoms, there lies empty space; that atoms are indestructible; have always been, and always will be, in motion; that there are an infinite number of atoms, and kinds of atoms, which differ in shape, and size. Of the mass of atoms, Democritus said "The more any indivisible exceeds, the heavier it is." But his exact position on weight of atoms is disputed.

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DEMOCRITUS' LIFE
Democritus was born in the city of Abdera in Thrace. He was born in 560 B.C. Democritus followed in the tradition of Leucippus, who seems to have come from Miletus. He carried on the scientific rationalist philosophy associated with that city.

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AMEDEO CARLO AVOGADRO

AMEDEO CARLO AVOGADRO'S LIFE
Amedeo Carlo Avogadro was born in Turin, Italy in 1776 to a noble family of Piedmont, Italy. He graduated in ecclesiastical law at the early age of 21 and began to practice. Soon after, he dedicated himself to physics and mathematics (then called positive philosophy), and in 1809 started teaching them at a liceo (high school) in Vercelli, where his family lived and had some property.

AMEDEO AVOGADRO'S THEORY
Avogadro's Law states that the relationship between the masses of the same volume of different gases (at the same temperature and pressure) corresponds to the relationship between their respective molecular weights. The relative molecular mass of a gas can be calculated from the mass of sample of known volume. The greatest problem Avogadro had to resolve was the confusion at that time regarding atoms and molecules. One of his most important contributions was clearly distinguishing one from the other, stating that gases are composed of molecules, and these molecules are composed of atoms.

Kathleen Stockman