PPT-2011-10-10 1 ZPS scoping f bonds and electrons at the atomic scale

Part IV 41 Challenge GNR edge and Graphite vacancy Dirac fermions Ugeda et al PRL2010 Enoki et al Int Rev Phys Chem 2007 20111010 2 c e 20111010 3 A Baraldiet al. (16.4-16.6). Solution of SE for molecules is more complicated due to much larger number of electrons and multiple nuclei. SE is still not exactly solvable since more than one electron is involved. Atomic orbitals are not appropriate since multiple nuclei are involved. COVALENT BOND. bond. formed by the . sharing . of . electrons . Covalent . Bonds. Between nonmetallic elements of similar electronegativity. .. Electronegativity = how badly an atom wants to add an electron (non metals have higher electronegativity). Chemistry. Learning Goals . To be able to . explain and draw atomic structure. Elements. Elements are the . building blocks. of all . matter. on Earth. Elements are made up of . atoms. Differences in . 1.c. – Students know how to use the periodic table to identify alkali metals, alkaline earth metals and transition metals, trends in ionization energy, electronegativity, and the relative sizes of ions and atoms.. Advanced Chemistry. Ms. . Grobsky. Food For Thought. Rutherford’s model became known as the “planetary model”. The “sun” was the positively-charged dense nucleus and the negatively-charged electrons were the “planets”. Chapter 1D. Warm Up November . 28. What is smaller, an atom or a cell? . Name and describe one element that you are familiar with on the periodic table. . When large blooms of algae die, decomposers use all the oxygen in the water to break down the dead algae. What is this a result of? . Noble gases and diatomic elements (except bromine, and iodine). These all have only London dispersion forces. . These are very weak intermolecular forces.. They all have very low melting points, obviously since they are gases.. Traditionally known as a “safe investment”. Typically less volatile than stocks. Offer regular interest payments. Have first priority in any liquidation. The Safer Alternative to Bonds. . Jim Royal (September, 2011). Analysis and Overview. James . Shaffner, Project Manager. Division of Decommissioning, Uranium Recovery, and Waste . Programs . U.S. Nuclear Regulatory Commission. A presentation to the. Low-Level Waste Forum. 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. . 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.. 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.. Pre-AP Chemistry. Charles Page High School. Stephen L. Cotton . Section 4.1 Defining the Atom. The Greek philosopher . Democritus. He believed that atoms were . indivisible. . and . indestructible. Dalton’s Atomic Theory. 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.