CHEMICAL BONDING MOKAN A/L VELAN (SCPNG0000019030) SANDEEP SINGH JASPREET SINGH TABLE OF CONTENT Contents IONIC BOND 2 METALLIC BOND 9 The "Sea of Electrons" Theory 14 Conductors‚ Insulators and Semiconductors 16 25 IONIC BOND Ionic bond is formed when electron transferred from a valence shell of an atom to the valence shell of another atom. Ionic bond involves electron transfer across two atoms. The atom which donates the electron is called cation which is a positive ion whereas
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envelop hope into Tsotsi showing his true feelings: Morris‚ a man unable to walk due to a horrific mining accident‚ Boston‚ a man with his own sense of “decency” but caught up in gang activity‚ and the baby and Miriam‚ teach Tsotsi deference and maternal responsibility which enables Tsotsi to become a loving sympathetic young adult. To begin with‚ Morris Tshabalala is a crippled man who gradually teaches Tsotsi sympathy. As Morris is crawling away from Tsotsi‚ Tsotsi tells himself‚ “The truth
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Fixed-Income Analysis Lectures 8 and 9: Active Bond Portfolio Strategies Joëlle Miffre 1 Active Bond Portfolio Strategies Market Timing: Trading on Interest Rate Predictions Riding the Yield Curve Timing Bets Based on Interest-Rates Level When Rates are Expected to Decrease When Rates are Expected to Increase: Roll-Over Strategies Bets on Specific Moves of the Yield Curve Barbell‚ Bullet‚ Ladder‚ Butterfly Other Semi-Hedged Strategies: Ladder Hedged against Slope Movement
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INTRODUCTION TO CHEMICAL BONDS CHEMICAL BOND Definition: A chemical bond is defined as a force that acts between two or more atoms to hold them together as a stable molecule. Main types of bond: 1. Ionic or electrovalent bond‚ 2. Covalent bond‚ 3. Coordinate covalent bond Forth type of bond: Metallic bond: The type of bonding which holds the atoms together in metal crystal. Valence electron: The electrons in the outer most energy level in an atom that takes part in chemical
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Chemical bond From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds" such
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Daughter Leaving Home I love this poem the first time I read it. For no reason‚ I instinctively think the speaker of it is a mother. With simple language‚ free style and delicate thoughts‚ this poem has annotated the most common and yet the greatest maternal love. Reading this poem‚ I can’t help thinking about my mother‚ a woman who often crys in the phone like a kid saying that she missed me so much. Since my childhood‚ she grows more and more dependent on me. However‚ different from other traditional
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a net attractive force between the atoms ... a chemical bond. The two extreme cases of chemical bonds are: Covalent Bonds Covalent chemical bonds involve the sharing of a pair of valence electrons by two atoms‚ in contrast to the transfer of electrons in ionic bonds. Such bonds lead to stable molecules if they share electrons in such a way as to create a noble gas configuration for each atom. Hydrogen gas forms the simplest covalent bond in the diatomic hydrogen molecule. The halogens such as
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sacrifices in order to keep the department running‚ such as working less hours or even a temporary pay cut. If the team is able to join together and come thru a difficult time they will be more bonded and work more efficiently than ever before. Emotional bonds motivate employees to put forth effort‚ communicate honestly‚ and openly‚ and enable them to handle conflict in a positive manner (Spector‚ 2010). References Spector‚ B. (2010). Implementing Organizational Change-Theory into Practice (2nd ed.).
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Covalent Bonds Covalent bonds are formed when atoms share electrons‚ one from each atom in a single bond‚ to form electron pairs‚ usually making their outermost shells up to eight electrons by this means. This would make them more stable‚ less reactive and an electronic structure like a noble gas. They are most frequently formed between pairs of non-metallic elements. Non-metallic elements usually have from four to eight electrons in their outermost shells‚ the so-called valency electrons‚ which
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by chemical bonds. These chemical bonds are of two basic types—ionic and covalent. Ionic bonds result when one or more electrons from one atom or group of atoms is transferred to another atom. Positive and negative ions are created through the transfer. In covalent compounds no electrons are transferred; instead electrons are shared by the bonded atoms. The physical properties of a substance‚ such as melting point‚ solubility‚ and conductivity‚ can be used to predict the type of bond that binds
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