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Essay on "ancient Greek democracy
Essay on "ancient Greek democracy
Historical development of atom
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Believed to be the first atomic theorist, the Greek materialist philosopher Democritus explored the nature of stones in 400 B.C. Democritus split a stone in half and concluded that the two halves have the same properties; the only difference between them and the original was size. However, that observation did not hold forever because the more he split the stone pieces into halves, the tougher the process was. At one point, he tried his best but failed to split a small stone piece. He called it "atomos," which is the Greek word for indivisible. The first major observation to atomic theory was thus made: matter is composed of sub-parts which are unvarying and indivisible. He also hypothesized two ideas: different atoms were only different in aspects regarding shape and size, and all atoms are always in motion, resulting in some collisions which cause dissociations or combinations (changes in state of matter). Around the same time, in the fourth century B.C, an Indian philosopher named Kanada was also working to explain atomic …show more content…
Dalton linked various laws and ideas to create a relatively accurate atomic theory. The first idea he used in his linking was the Law of Conservation of Mass (formulated by Antoine Lavoisier saying that the total mass of the products equals the total mass of the reactants in a chemical reaction). Lavoisier’s law implied that matter is indestructible, which was crucial to Dalton’s thought formulation. Another important link for Dalton was the Law of Definite Proportions (Joseph Proust proposed it which states that for any quantity of a substance the proportions of the masses of elements composing it will always be tantamount). Dalton reworded this law and took a step further, stating that elements combine in integer ratios to form compounds. His findings of the most updated atomic model were as
Primo Levi’s personal relationship to his profession as a chemist shows that philosophically and psychologically, he is deeply invested in it. His book THe PeriOdic TaBLe shows that his methodology cannot be classified as either purely objective or purely subjective. He fits into the definition of dynamic objectivity given by Evelyn Fox Keller in her book Reflections on Gender and Science.
Edward Barry Dalton is the only member of the regiment to have been the subject of a previously published work. A short biography including a selection of the surgeon’s wartime official correspondence entitled Memorial of Edward B. Dalton M.D. was complied and published as a tribute by his brother John Call Dalton shortly after his death in 1872. (John Call Dalton, Memorial of Edward B. Dalton)
Although the atomic theory was developed in increments, George Johnston Stoney is most famous for contributing the term electron: fundamental unit quantity of electricity. Stoney would develop the concept fourteen years before he coined the term electron. He also made contributions to the theory of gasses, cosmic physics, and estimated the number of molecules in a cubic millimeter of gas.
Dalton’s atomic theory, which stated “the atoms were tiny, indivisible, indestructible particles” (Bender), differed drastically from that of the Greeks’ in that it “wasn’t just a philosophical statement that there are atoms because there must be atoms” (Bender). Although Aristotle believed that there are four terrestrial elements, earth, water, air, and fire, Democratus believed that “a piece of a substance can be divided into smaller pieces of that substance until we get down to a fundamental level at which you can’t divide the substance up and still have pieces of that substance” (“Atoms”). Aristotle’s theory was popular, but incorrect; Democratus’s was closer to our current theory, yet he remained relatively unpopular and obscure. This demonstrates of the key way in which a personal point of view can, in fact, retard the pursuit of knowledge. The scientist with the better oratory abilities has his theories more widely accepted. Dalton’s own theory, which extrapolated upon four basic
Although atomism certainly was not a new philosophy by the time Lucretius wrote, or even by the time of Rome’s ascension to power, the original propositions regarding the nature of matter were not enough to construct a philosophy similar to that presented by Lucretius. Over time, atomism had evolved from a binary view that the world consisted solely of atoms and void, ...
John Dalton was born on September 6 1766 at Eagelsfield, Cumbria in England.Although he was born in England, he spent most of his life in Manchester.He was born into a Quaker family and while his family had food, they were still poor. His father Joseph was a weaver and John recieved most of his early education from his father. At the age of 12, John opened a school in Eagelsfield where he was the master. He was often threatened by the older boys who wanted to fight him because he was smarter, but he managed to keep in control for 2 years.Due to a poor salary, John was forced to leave his school and work in the fields with his brother. In 1781 John and his brother moved to Kendall. There John, his cousin George, and his brother ran a school where they offered English,Latin,Greek,French and twenty one mathematics and science course. Their school had sixty pupils. After twelve years at Kendall John started doing lectures and answering questions for mens magazines. John found a mentor in John Gough,who was the blind son of a wealthy tradesman. John Gough taught Dalton languages,mathematics,and optics. In 1973 John moved to Manchester as a tutor at New College. He immediately joined the Manchester Literary and Philosophical Society and in the same year he published his first book: Meteorological Observations and Essays. In his book Dalton stated that gas exits and acts independantly and purely physically not chemically. After six years of tutoring, John resigned to conduct private research while still doing tutoring at 2 shillings a lesson. In 1802 John stated his law of partial pressures. When two elastic fluids are mixed together ( A and B) they dont repel each other. A particles do not repel B particles but a B particle will repel another B particle. One of his experiments involved the addition of water vapor to dry air. The increase in pressure was the same as the pressure of the added water. By doing this experiment, John established a relationship between vapor pressure and temperature. John’s interest in gases arose from his studies of meteorology. He had weather equipment that was with him at all times and he was constantly studying weather and atmosphere. He also kept a journal throughout his life in which he wrote over 200,000 observations. In 1803, John made his biggest contribution to science: The Atomic Theory.
This showed that dissolved gases were mechanically mixed with the water and weren?t mixed naturally. But in 1803 it was found that this depended on the weight of the individual particles of the gas or atoms. By assuming the particles were the same size, Dalton was able to develop the idea of atomic weights. In 1803 this theory was finalised and stated that (1) all matter is made up of the smallest possible particles termed atoms, (2) atoms of a given element have unique characteristics and weight, and (3) three types of atoms exist: simple (elements), compound (simple molecules), and complex (complex molecules).
The Atomic Theory began in roughly 400BC with Democritus in Ancient Greece and is universally believed to be correct today. Democritus who was born in 460 BC and died 370 BC and is known as the father of modern science. Democritus proclaimed that everything is made up of atoms. He continued his theory to say that atoms will always be in motion, between atoms there is empty space, atoms are unbreakable, there are an infinite number of atoms all different sizes and shapes. He also said that iron atoms are solid and strong and have hooks to lock them together, water atoms are smooth and slippery, salt atoms have sharp jagged edges because of its taste and air atoms are light and spiralling.
Dalton was the first person to develop a scientific atom theory, the ancient Greeks had ideas about the atom but could not prove it scientifically.
Then, in 1766 was born a man named John Dalton born in England. He is known as
The idea of the atom started all the way back from the ancient Greece. What is sad about this is that one philosopher’s idea it was rejected by the rest of the philosophers of the time. Philosophers like Aristotle. The ancient Greeks did not have all the modern technology we have now and were not equipped to test their atomic theory. The theory they had hypothesized was if you keep dividing something, the smallest living thing had to be an atom.
Things are very different from each other, and can be broken down into small groups inside itself, which was then noticed early by people, and Greek thinkers, about 400BC. Which just happened to use words like "element', and `atom' to describe the many different parts and even the smallest parts of matter. These ideas were around for over 2000 years while ideas such as `Elements' of Earth, Fire, Air, and Water to explain `world stuff' came and went. Much later, Boyle, an experimenter like Galileo and Bacon, was influenced much by Democritus, Gassendi, and Descartes, which lent much important weight to the atomic theory of matter in the 1600s. Although it was Lavoisier who had divided the very few elements known in the 1700's into four different classes, and then John Dalton made atoms even more believable, telling everyone that the mass of an atom was it's most important property. Then in the early 1800's Dobereiner noted that the similar elements often had relative atomic masses, and DeChancourtois made a cylindrical table of elements to display the periodic reoccurrence of properties. Cannizaro then determined atomic weights for the 60 or so elements known in the 1860s, and then a table was arranged by Newlands, with the many elements given a serial number in order of their atomic weights, of course beginning with Hydrogen. That made it clear that "the eighth element, starting from a given one, is a kind of a repeat of the first", which Newlands called the Law of Octaves.
This law states that, “when elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties” (textbook). From that, the modern periodic table was born; “each new horizontal row of the table corresponds to the beginning of a new period because a new principal energy level is being filled with electrons” (textbook).
Scientists from earlier times helped influence the discoveries that lead to the development of atomic energy. In the late 1800’s, Dalton created the Atomic Theory which explains atoms, elements and compounds (Henderson 1). This was important to the study of and understanding of atoms to future scientists. The Atomic Theory was a list of scientific laws regarding atoms and their potential abilities. Roentagen, used Dalton’s findings and discovered x-rays which could pass through solid objects (Henderson 1). Although he did not discover radiation from the x-rays, he did help lay the foundations for electromagnetic waves. Shortly after Roentagen’s findings, J.J. Thompson discovered the electron which was responsible for defining the atom’s characteristics (Henderson 2). The electron helped scientists uncover why an atom responds to reactions the way it does and how it received its “personality”. Dalton’s, Roentagen’s and Thompson’s findings helped guide other scientists to discovering the uses of atomic energy and reactions. Such applications were discovered in the early 1900’s by using Einstein’s equation, which stated that if a chain reaction occurred, cheap, reliable energy could b...
Democritus was the leader of a group called Atomists. Although they were unable to prove that matter was made up of small particles, they were the first to come up with the idea. Democritus believed that atoms differed in size, shape, and movement but were all made of the same substances. Aristotle was the most important scientific philosopher in Greece. He believed that all matter on earth consisted of four pure substances or elements, which were earth, air, fire, and water. He also believed that the earth was the centre of the universe, and that anything beyond the earth consisted of a fifth pure substance called quintessence. Archimedes was an inventor and mathematician, who discovered several basic scientific principles and developed a number of measuring techniques. Ptolemy was an Egyptian astronomer. He developed a model for predicting the positions of the sun, moon, stars, and planets. Like Aristotle, he believed that the earth was the center of the universe. Between 400 AD. and 1000 AD.