PPT-Dalton’s Atomic Theory

Law of Conservation of Mass The total mass of materials after a chemical reaction is the same as the total mass before the reaction Law of Constant Composition The elemental composition of a compound is always the same. 096 Recommended Resources Civilization Revolution Manual p 51 61 CivilizationRevolutionExpandedDSManualpdf httpdownloads2kgamescomcivilizationrevolutionCivilizationRevolutionExpandedDSManualzip wwwcivfanaticscom forums2kgamescom TechTreeDetailspdf 2:. Atomic Theory. and Structure. (. c. 400 B.C.. ) Democritus proposed that “. atomos. ” are . indivisible. .. Atom. : . smallest particle . of matter that . retains its properties. .. Early Models of the Atom. and bond strength . in heavy element compounds from . the quantum theory of atoms in molecules. Nik. . Kaltsoyannis. Department of Chemistry, University College London. Plan of campaign. Why is . covalency. LAW. By Raymond . Greenlaw. Learning Objectives. State Dalton’s Law. Understand Dalton’s Law. Apply Dalton’s Law. Explain relevance of Dalton’s Law to scuba. John Dalton. English chemist. Father of atomic theory. Who first thought of the atom?. Democritus. Leucippus. Democritus and Leucippus. ~440 BC. They were the first philosophers that believed that atoms existed.. They thought that you could cut something in half , over and over, until you eventually get to a particle so small that it can no longer be cut In half.. Atomic Theory Timeline . Scientific knowledge builds on past research and experimentation.. Democritus. 400 B.C.. Information. Atomic Model. Analogy. Democritus, a philosopher in ancient Greece,. . began the search for a description. Principal Source:. Boltzmann’s Atom. David Lindley, The Free Press, . New York 2001. Atom. Greek ‘Uncutable’ . Universe composed of indivisible objects. Philosophy and Atomic Theory. Titus Lucretius . Review for Quiz. Match the Atomic Model to the Person who designed the model.. Use the Models Above . Niels. Bohr. John Dalton. Ernst Rutherford. J.J. Thomson. Niels. Bohr - D. John Dalton - A. Ernst Rutherford - C. Chapter 3. Types of Models – Why do we use models?. Physical Model vs. Conceptual Model. Physical model. is a representation of a very large or small object shown at a convenient scale. . FDR receives a letter from Albert Einstein. Informed FDR of recent developments in splitting uranium atoms. Could lead to “extremely powerful bombs of a new type” by means of nuclear fission. Nucleus absorbs a neutron, breaks into two equal fragments. How and why has the Atomic Theory changed over time? . How can we describe the molecular motion of the states of matter? . Objectives. Students will explain that atoms are the smallest unit of an element and are composed of subatomic particles.. OF BOXESCOMPANYADDRESSCITY/TOWN1Old Country InnJiminy PeakHancock2Wyndham/Bentley Brook1 Corey RdHancock1OrchardsHotel/Catering222 Adams RoadWilliamstown1Dunkin Donuts361 Main StWilliamstown1Aubuchon Atoms of the same element . can. have different . mass numbers.. Isotopes. How can atoms of the same element end up with a different mass?. Shoulder Partners. Frederick Soddy. (1877-1956) proposed the idea of isotopes in 1912. Science is based off of observations.. A Scientific Law is a summary of what is seen in observations. . A Scientific Theory is an explanation of why these observations are occurring.. Both laws and theories are tested by using them to predict what would happen in certain situations..