equation – Representation of atomic orbitals as wave functions – Electron densities and radial distribution functions – Understanding the effects of shielding and penetration on AO energies • Bonding – Review VSEPR and Hybridisation – Linear combination of molecular orbitals (LCAO)‚ bonding / antibonding – Labelling of molecular orbitals (MOs) (σ‚ π and g‚ u) – Homonuclear diatomic MO diagrams – mixing of different AO’s – More complex molecules (CO‚ H2O ….) – MO diagrams for Transition
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Revision checklist for IGCSE Chemistry 0620 A guide for Students Revision checklist for IGCSE Chemistry 0620 A guide for students How to use this guide The guide describes what you need to know about your IGSCE Chemistry examination. It will help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using tick boxes in Section 3‚ ‘What you need to know’‚ to check
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CHAPTER 5: PERIODIC TABLE Development of the Periodic Table • i) Substance exist: naturally in elemental form Example: Gold‚ Uranium as unstable compound Example: Radioactive compounds as stable compound (majority) How to know whether a substance is a compound OR an element? ii) iii) • • • Grouping system: 1800: 31 elements identified 1865: 63 elements identified Audi Majdan – DMC 101 – KLIUC 1 • Dmitri Mendeleev: i) ii) iii) iv) Develop a system to group
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Chapter 8 Bonding: General Concepts Types of Chemical Bonds Bond energy refers to the energy that bonds hold with each other‚ it is tested by how much energy it takes to break the bond‚ whatever it takes to break‚ it takes to create and hold. Ionic Bonding is made between two oppositely charged ions come together to form a bond Ionic Compound is a nonmetal and a metal that bonds. Bond Length is the minimal distance between the two atoms. Covalent Bonding is when atoms “share” electrons in order
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Corrosion Cell Electrolyte Fe++ H0 H0 Conventional Current Flow H0 H0 H0 2eAnode Electron Current Flow Metallic Path Cathode _____________________________CORRTECH The Corrosion Damage Begins Rust expands volume 5-10x’s Internal stress + 5‚000 psi Electron Migration (e-) _____________________________CORRTECH Corrosion Cell Elements • • • • Anode Cathode Metallic path Electrolyte Eliminate
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Interests in Property The goal of this paper is to establish whether Pamela has priority over the two mortgagees on the proceeds of the sale of the property in Dunroamin. It is also to establish if Pamela and Jack have a right over the items removed from the property they had purchased from Ahmed that were present during the purchase of the house. Finally‚ the paper is to determine whether Pamela can claim a right over the metal object that she picked at the garage. This paper will make use of case
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Identification of Metallic Ions Peter Jeschofnig‚ Ph.D. Version 42-0160-00-01 Kellie Long Purpose: To observe the different flames of alkali and alkaline metals. Procedure: Place a little bit of each element into the well plate. Then you soak a tip of a cotton swab in each solution. Then you place the cotton swab over the Bunsen burner until the flame changes color. observations The color of the flame is expected to be as follows: Metallic ion Flame color
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Bonding and Bonded Bunnies Bonding and Bonded Bunnies Rabbits are very sociable creatures‚ which means that most rabbits like to have a friend to snuggle with‚ play with and live with. Finding a bunny friend for your rabbit can be easy‚ but equally‚ it can be very challenging to find bunnies that suit each other. Bonding rabbits does not depend on a rabbit’s age or breed; what it depends on is the personality of each rabbit. This means that a continental giant could bond with a netherland
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NICHOLLS M. C. WHITING. and Many aromatic compounds‚ ArH‚ displace carbon monoxide from chromium hexacarbonyl with the formation of complexes Cr(CO)‚(ArH) (I). These are stable and may carry any of several functional groups. The effects of the metallic residue upon typical properties of these groups and of the aromatic system as a whole are outlined‚ and methods for the regeneration of the aromatic components are described. TRICARBONYLBENZENECHROMIUM (I) was first obtained by Fischer and Ofele
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breathing. Even the police at the end of the story aren’t living- Leonard is confronted by a police car‚ which arrests him without a living person inside. Bradbury’s word choice creates a cold‚ unfriendly atmosphere‚ describing the car’s voice as “metallic” (2)‚ “iron” (4)‚ and even as “the phonograph voice” (3). The people in this society are so inanimate that they don’t even need the police to monitor them; in fact‚ only one police car remains in the population of three million. Because Bradbury
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