PPT-Atomic Theory Which shows a a correct image of what an atom looks like? How do you know?

DO NOW 1 2 3 4 The Greek Concept of Atomos The Indivisible Atom Around 440 BC Leucippus originated the atom concept His pupil Democritus c460371 BC extended it There are five major points to their atomic idea. 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.. Atomos: Not to Be Cut. The History of . the Atom and the Atomic . Theory. Atomic Models. This model of the atom may look familiar to you. This is . the Bohr model. . In this model, the nucleus is orbited by electrons, which are in different energy levels. . On your bell work . sheet, answer the following.. When . are zeros significant? . . When . do you use the fewest number of Significant Figures?. Objectives. The Structure of the Atom. Properties of Subatomic Particles. Chemistry. Videos . Atomic Theory: Dalton, Democritus, Thomson, Rutherford, and Quantum. History of the . atom. . History of the atom Video #2. The Development of the Atomic Theory. J.J. Thomson . Contribution. Review & Introduction for Science 10. Vocabulary. ATOM. :. smallest particle of an element, has a neutral charge.. ELEMENT. :. made up of 1 type of atom (. eg. . Oxygen, . O. ). COMPOUND:. . a pure substance made up of 2 or more elements that are . All atoms of an element have the same number of protons and the same atomic number.. Learning Goal . Given the atomic number and the mass number of an atom, state the number of protons, neutrons, and electrons.. What are the 3 major parts of an atom?. Proton . Neutron . Electron. Parts of an Atom. Another Model. SIMPLIFIED MODEL.. PROTON. Protons are positively charged particles found in the atomic nucleus. . 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 . The atom: from philosophy to scientific theory . 400 BC . – . Democritus. came up with the idea of the . ________. Nature’s . basic particle. ______________. His ideas were not useful in explaining chemical behavior because . 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.. Atoms are the fundamental blocks of matter…. Chapter Big Idea. Section 1: Early Ideas About Matter. What are the similarities and differences of the atomic models of Democritus, Aristotle, and Dalton?. Structure Of An Atom. Parts. Found in Nucleus. Protons . Neutrons. Found in shells or orbits. Electrons. Protons. Found . in. the . nucleus. Positively. charged. Determines. the . identity. 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.. Our view of the atom has changed over time. 2. Aristotle . (460 B.C. – 370 B.C.). emphasized that nature consisted of four elements: air, earth, fire, and water. did not believe in discontinuous or separate atoms, but felt that matter was continuous.