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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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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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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Bond Interest and Principal Payments A bond is a type of long-term debt that is issued by a corporation and is purchased by an investor for cash. A formal contract is issued by the corporation that states the legal terms of the bond. The advantages of issuing a bond from a corporation is that the ownership interest of the bondholders will not be diluted and those bonds are available at lower costs than the common stocks available. After a bond is issued by the corporation‚ the bondholder is promised
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adventure began in the early fifties when Ian Lancaster Fleming created the story Casino Royale on his Jamaican property called Goldeneye.1 Fleming transformed popular detective and spy/espionage from the dark‚ through the eye of secret agent 007. James Bond films are about a lady’s man/spy that has dedicated his life to a British intelligence agency called MI6. By utilizing the most technologically advanced spy equipment and specially designed vehicles that can withstand the most torturous conditions
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CHEMICAL BONDS Chemical Bonds I. Introduction Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms called a chemical bond. The two extreme cases of chemical bonds are the covalent bonds and ionic bonds. Covalent bonds are bonds in which one or more pairs of electrons are shared by two atoms. Covalent bonds‚ in
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Topic 2 Bond market developments Overview Financial markets have been subject to significant changes in recent years due to the credit crisis. Experts believed that risk was being under-priced‚ which was expressed in the markets by a narrow spread. They believed that once the market corrected this under-pricing and re-priced the risk‚ it would likely cause a dislocation in financial markets by overshooting its equilibrium. Hence the prices‚ yields and returns on bonds have been significantly
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Chemical Bonds Chemical Bond: is the force that holds atoms together in a compound. They form because they lower the potential energy of the charged particles that compose atoms. Chemical bonds can be broadly classified into two types: Ionic and Covalent. Ionic: metal & nonmetal Metals have a tendency to lose electrons and nonmetals have a tendency to gain them. The metal atom becomes a cation and a nonmetal becomes an anion. The oppositely charged ions attract one another and form an ionic
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Mid Term – October 2014 Bond Pricing Qu 1: Time to Maturity Zero Coupon Rate Discount Factor 1 5% 2 6% 3 7% 4 8% 5 9% Give the formula for the discount factor in terms of the zero coupon rate. Use the formula to fill in the discount factors in the table above (you can write the formula or using excel calculate the numerical value). Assume that the government wishes to issue a new 5 year bond priced at 100 (called a par coupon bond as it is priced at par i.e. the price is the same as the face
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