ipl-logo

Atomic Theory Timeline

1244 Words5 Pages

Development of the atomic theory Date Scientist Contribution Constraints 460-370 BCE Democritus • First proposed the existence of an ultimate particle 384-322 BCE Aristotle • Believed that no matter how many times you cut a form of matter in half, you always would have a smaller piece of that matter 1635-1682 CE Johann Becher • Developed the Phlogiston Theory (now obsolete) 1660-1734 CE Georg Stahl 1733-1804 CE Joseph Priestly • Discovered oxygen, which he called Dephlogisticated air 1743-1794 CE Antoine Lavoisier • Proposed the Combustion Theory and the Law of Conservation of Mass and named oxygen 1754-1826 CE Joseph Proust • Proposed the Law of Constant Composition 1776-1844 CE John Dalton • Proposed the Law of Multiple Proportions, …show more content…

(N/A). (N/A): (N/A). Retrieved 10 March 2015 from http://cstl-csm.semo.edu/cwmcgowan/ch181/atomhist.htm • Atomic theory timeline in Soft Schools.com. (2005-2015). (N/A): (N/A). Retrieved 10 March 2015 from http://www.softschools.com/timelines/atomic_theory_timeline/95/ • Atomic Structure Timeline in Atomic Structure Timeline.net. (1996). Watertown High School 825 Endeavour Drive, Watertown, Wisconsin 53098, America: Lee Buescher. Retrieved 10 March 2015, from http://atomictimeline.net/index.php • Modern Atomic Theory: Models in Development of the atomic theory. (2007). (N/A) : (N/A). Retrieved 10 March 2015, from http://www.abcte.org/files/previews/chemistry/s1_p6.html • Schrodinger’s cat in Wikipedia the free encyclopaedia. (2015). (N/A): (N/A). Retrieved 14 march 2015, from http://en.wikipedia.org/wiki/Schr%C3%B6dinger%27s_cat Most of my sources seem reliable. The information seems consistent between multiple websites, because I looked at more websites than what I have listed here, which I didn’t list because they didn’t have anything to add. Some of them are quite old (one was from 1996) and that would reduce the reliability of them because information changes over time. Alot of them don’t have an author listed in them so I can’t attribute information to a person or persons and that can impact the

Show More
Related

  • Mat 540 Final Paper

    696 Words  | 3 Pages

    According to the Bohr model of hydrogen atom, the kinetic and potential energies of the electrons vary as .......... .. and... distance of electron from the nucleus. respectively. where r is the The square of the wavefunction, y}, gives us the Absorption of a given amount of energy gives rise to a larger increase in entropy the the initial temperature. Orbital energies in multi-electron atoms are mere difficult to calculate due to the additional Select the correct answers from the following multiple choice questions.

    Read More

  • Comparing Rene Descartes And The Application Of Scientific Methods To Study The Brain

    735 Words  | 3 Pages

    Fechner was troubled by atomistic approach to science so he subscribed to what he called his “day view”, which means that the universe can be regarded from the consciousness. This stood against the prevailing “night view” which mean the universe, which included consciousness, consisted of nothing but inert matter. In 1830 Fechner translated more than a dozen volumes of handbooks of physics and chemistry from French into Germen, resulting in Fechner being recognized as a physicist. In 1850 while lying in bed Fechner had an insight about the connection between mental sensation and a material stimulus. Fechner believed that an increase of intensity of a stimulus does not produce a one-to-one increase in the intensity of the sensation.

    Read More

  • Gen 1051 Final Lab Report

    813 Words  | 4 Pages

    Our latest lab covered a detailed description of atoms and molecules, laid out in a distinctive way using balls and sticks for valence electrons and bonds. We were given charts to fill out recoding our findings regarding several molecules and their electron count, type of bonds,

    Read More

  • Flame Tests Of The Elements Lab Report

    1017 Words  | 5 Pages

    One must look to see which element has both violet and orange spectra lines. It is shown that the element Cesium is the only element that has both violet and orange spectra lines. 2. Describe two different approaches to exciting the electrons that exist in elements. Offer a specific reason why scientists use different approaches to excite the electrons of different elements.

    Read More

  • Qnt 561 Week 1 Review Sheet

    2544 Words  | 11 Pages

    FBARevised Physics 121 Fall 2014 Document #05 – Cycle 1 Review Sheet, Part 1 page 5 of

    Read More

  • History Of Atom Dbq

    375 Words  | 2 Pages

    Scientist continued to develop the world's knowledge of the atom. In 1896, Henri Becquerel accidentally discovered radioactivity(Doc.1). Furthermore, in 1911, Ernest Rutherford discovered atoms were made of smaller particles and that they had a positively charged nucleus(Doc.1). Throughout decades, scientist have honed ,developed, and continued in the study of the science of the

    Read More

  • Modernism The Assault On Tradition Study Guide

    796 Words  | 4 Pages

    Science took a dramatic change with quantum physics developed by Albert Einstein, when he made public “his special theory of relatively in 1905” (384). Bringing new ideas and concepts about time, space, and motion. Another innovator is Werner Heisenberg

    Read More

  • Ap Chemistry Application Essay Sample

    497 Words  | 2 Pages

    AP Chemistry enthralled me with its indecipherable French theories and alphabet of Greek formulae, for my studies transmuted these into poignant prose. Information that had once seemed impossibly complex soon flowed from my mind as effortlessly as a pleasant conversation with a friend, and I began tirelessly consuming the material as though I had been starving for it. Cravings which had been subconsciously growing in me since childhood were relieved with a feast of answers: The fundamental concepts of existence revealed in a humble high school classroom. Soon, the only thing more insatiable than my curiosity was my ambition to apply this newly-acquired knowledge to the aching problems of the world. Studying the very building blocks of the universe

    Read More

  • Niels Bohr: Making The Atomic Bomb

    172 Words  | 1 Pages

    He would go on to make the bohr attomic model but, then die a couple years later

    Read More

  • How The Atomic Bomb Changed Human History

    2081 Words  | 9 Pages

    The first self sustained nuclear chain reaction occurred in 1942 in an abandoned squash court at the University of Chicago. (Roleff 46) Enrico Fermi was the head of the project. Without the chain reaction the Atomic Bomb would never of been built. (Stein 15)

    Read More

  • Calorimetry Research Paper

    865 Words  | 4 Pages

    Although not linear, a trend that is established is that as one looks across a period there is an increase in density until around group 11 in period IV. This trend varies depending on the row being examined but for the most part has an increase, an area of consistency, then a decrease. This trend can be observed based on the graph comparing Period IV density and atomic number. The point of decrease occurs around atomic number 28.

    Read More

  • Schrodinger Parallel Universes

    926 Words  | 4 Pages

    In 1935, an Austrian physicist named Erwin Schrodinger conducted a thought experiment in which he tested the Copenhagen interpretation of quantum mechanics. The Copenhagen interpretation of quantum mechanics states that a quantum system will remain stagnant in a form of superposition until it is interacted with by an outside force, in which it will thrust itself into one of the possible outcomes. Schrodinger illustrated this theory by picturing a cat being locked into a box with a broken glass of prussic acid (commonly known as HCN or hydrogen cyanide). Schrodinger then theorized that the cat was living in a state of superposition, in which it was both alive and dead. Using the Copenhagen interpretation of quantum mechanics, the cat was in

    Read More

  • Nuclear Energy Thesis

    1617 Words  | 7 Pages

    "World Nuclear Association. "Outline History of Nuclear Energy. Ed. World Nuclear Association. World Nuclear Association, n.d. Web.

    Read More

  • Informative Speech On Albert Einstein

    1132 Words  | 5 Pages

    ii. Can you give me an example of one of his contributions do science? 1. In the year of 1905, Albert Einstein published a paper advancing the hypothesis that light energy is carried in discrete quantized packets to explain experimental data from the photoelectric effect.

    Read More

  • Albert Einstein Research Paper

    891 Words  | 4 Pages

    In 1905 he was hired as a professor in the University of Zurich for his Annus Mirabilis-the four major papers that he wrote in his life. The first one was about the theoretical dissertations on the dimensions of molecules. The second was about the Brownian Motion; he made predictions about the motion of particles. The third one was about the Photoelectric Effect, which contained a revolutionary hypothesis on the nature of light. In this paper he wrote about the photon being proportional to frequency.

    Read More

More about Atomic Theory Timeline

Open Document