History Of Atomic Theory Of The Atomic Model - 1444 Words

History of Atomic Theory The development of the atomic model began in 400 B.C. when Greek philosophers, Leucippus and his pupil Democritus theorized the existence of atoms. They came up with the idea that matter of composed of tiny particles, but didn’t think their theory was particularly special. They knew that at a certain point it was impossible to divide matter so they coined the term ‘atomos’ with literally meant â€Å"uncuttable† or â€Å"indivisible†. They also attributed the properties of the atoms from the properties of the substance. The two philosophers achieved their theory without any experiments but, by solely on insightful guesses. Aristotle believed that all matter consisted of 5 elements, four of which were earthly. He believed that the four elements, fire, air, water, and earth had special properties. Earth was cold and dry, water was cold and wet, air was hot and wet, fire was hot and dry. He also explained that there elements has a natural motion. Air and fire always tended towards the lunar sphere and, water and earth always tended towards the center of the universe (center of the earth). The next major achievement didn t come until 1789 when Antoine Lavoisier proposed the law of conservation of mass. The law of conservation of mass stated that the mass of any one element was the same at the beginning and at the end of a reaction. In other words the matter was neither created nor destroyed in the reaction. â€Å"The Father of Modern Science† repeated theShow MoreRelatedThe History Of Atomic Structure1720 Words   |  7 PagesThe History of Atomic Structure What is the atomic structure you may ask? Well, it’s the law stating the structure of an atom. It is composed of a positively charged nucleus containing a certain amount of protons (positive), neutrons (neutral charge), and electrons (negative). The amount of each subatomic particle (proton, neutron, and electron) all depend on what the element is. Now although this statement may seem fairly simple it was most definitely not. People have been studying the atomic structureRead MoreHistory Of An Atom. In This Day And Age, Almost Every Educated987 Words   |  4 PagesHistory of an Atom In this day and age, almost every educated middle school student would be able to sketch and label a given diagram of an atom. However, still to this day, not one human has seen what an atom looks like. Our current atomic model, the same one in which you most likely learnt in 5th grade, is really just an educated theory, comprised of years of experimental trials and errors. In fact, the ‘original’ four elements, introduced by ancient philosopher Aristotle: Fire Air, Water, andRead MoreThe Atomic Theory1649 Words   |  7 PagesThe history of the atomic theory is thoroughly extensive. It had all started around 400 BCE when few people believed in an atomic theory, that atoms are building blocks. Democratic believed matter was made up of tiny particles. He called them atomos. Democratic is Leucippus’ most infamous pupil Later in history, the law of definite proportions was discovered. Two samples of given compounds are made of the same elements in exactly same propo rtions by mass regardless of the size or sources of the samplesRead MoreAtom History Essay960 Words   |  4 PagesAtom History Essay An Atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The Atom was theorized by a man named Democritus of Abdera, Thrace in between c.a 460 BC - ca. 370 B.C. Atom is derived from the Greek word â€Å"atomos† , which means to be uncuttable. He had a theory that everything is composed of â€Å"atoms†, which he believed that these minuscule objects are indivisible, indestructible and have and always been in motionRead MoreThe Physics Of Atomic Theory1142 Words   |  5 Pagesdevelopment of atomic theory, and made science changing discoveries that are still today quite impressive, even in comparison to modern day scientists. There are countless scientists involved in the evolution of atomic theory, but less than 50 have majorly impacted the way we view atomic theory today. Discovery and experimentation on the atom first began in the Greek Era with scientists as old as Democritus and Aristotle. Democritus was believed to be the first person to touch on the atomic theory. He statedRead MoreHuman Science And Natural Science1276 Words   |  6 PagesThe roles of logic, reason, and emotion will be investigated to see how they are used to help gain new knowledge in both human and natural science. Many knowledge claims in human and natural science are based on theories. Jean Lamarck proposed the theory of evolution in 1801. The theory of evolution proposed by Lamarck was based on the idea that organisms had to change their behavior to survive. For instance, if a giraffe stretched it neck for a long period of time to reach the leaves as the topRead MoreThe History Of Atomic Structure1504 Words   |  7 PagesEliza Abrams Mrs. Baldwin Honors Chem â…˜ 24 November 2015 The History of Atomic Structure For many years Greek philosophers were intrigued by the question of what matter consists of(Lucretius 31). In the fifth century BC, Democritus was the first philosopher to come up with a coherent atom theory. Based upon the reasoning that a stone can be split in half an infinite number of times, he hypothesized that at some point the stone would be too small for the eye to see. Democritus categorized such minisculeRead MoreThe Nuclear Theory Of The Atomic Theory1363 Words   |  6 PagesThe Atomic Theory The atomic theory is a fundamental scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms, which came from the Greek word atomon, meaning ‘uncuttable’. This theory was based on the concept that any given item in the universe could be broken down using pico- and femtometer atomic/subatomic/alpha particles. If this idea had never been composed, science would have suffered as a result and many scientists would not have beenRead MoreAtomic Structures And The Atomic Structure Essay984 Words   |  4 Pages Atomic Structure Timeline Welcome to the atomic structure timeline. This site explores discoveries related to atomic structure including the electron, proton and neutron. The dates used for events are open to debate since many scientist s spent decades studying a topic. Check the links for more in depth material. Most of all enjoy. Created by Lee Buescher, ScienceDept, Watertown High School Watertown, Wisconsin 53098 USA Visit these sites for original papers in chemistry. 1. SelectedRead MoreAtomic Timeline : The Alchemy1667 Words   |  7 PagesAtomic Timeline The Alchemists (500BC-1700BC) The study of Alchemy first began with Aristotle’s idea that all matter was composed of earth, water, fire, and air. It became a foundation for modern sciences, especially chemistry. The main goal of the Alchemists was to find a way to change ordinary metals into precious one such as gold and silver. However, they were never able to accomplish this. Nevertheless, the findings from the experiments of the Alchemists are now classified as chemical properties