PPT-Lecture 1 Chemical bond

and structure of organic compounds Organic and inorganic compounds Structure of organic compounds and the nature of chemical bond Nomenclature of organic compounds Outlook Organic and inorganic compounds. mo A chemical look at proteinsi.Introduction to proteins and amino acidsii.Conformational peculiarities of peptide bondsiii.St Collaborations between amino acids in proteinsb. structures.iii.Thermodyn Bonding. p. 144-156. Remember….. There are two kinds of pure substances. Elements. Compounds. Elements. Substance that cannot be separated or broken down into simpler substances by chemical means.. Introduction to Chemical Bonding. Introduction to Chemical Bonding. Objectives:. Define . chemical bond.. Explain why most atoms form chemical bonds.. Describe ionic and covalent bonding.. Explain why most chemical bonding is neither purely covalent nor purely ionic.. The . attractive force which holds . various constituents . (atoms, . ions, etc. .) together in . different chemical . species is called a chemical bond.. KÖSSEL-LEWIS APPROACH TO. CHEMICAL BONDING. This topic will be investigated under five main headings:. Chemical Compounds. . Ionic Bonding. . Covalent Bonding. Electronegativity. . Shape of Molecules and Intermolecular forces. Chemical Compounds. There are two kinds of pure substances. Elements. Compounds. Let’s start the new notes…. Elements. Substance that cannot be separated or broken down into simpler substances by chemical means.. Ex’s- . Thermodynamics. is the study of energy and how it is interconverted.. First law of thermodynamics. – energy cannot be created or destroyed; it can only be converted from one form to another (. law of conservation of energy. Bonds and Energy. Breaking chemical bonds . requires. energy. Forming chemical bonds . releases. energy. The amount of energy required or released for a chemical process depends on the number and types of bonds that are formed and broken. with applications to catalysis, materials science, nanotechnology, surface science, bioinorganic chemistry, and energy. William A. Goddard, III, . wag@wag.caltech.edu. 316 Beckman Institute, x3093. Charles and Mary Ferkel Professor of Chemistry, Materials Science, and Applied Physics, . is . concerned that he cannot remember all of the important information about the . different types of. chemical bonds, so he asks his . tutor, Josh, . to help him review the different types of chemical bonds prior to choosing his research topic. . with applications to catalysis, materials science, nanotechnology, surface science, bioinorganic chemistry, and energy. William A. Goddard, III, . wag@wag.caltech.edu. 316 Beckman Institute, x3093. Charles and Mary Ferkel Professor of Chemistry, Materials Science, and Applied Physics, . Covalent Bond. bond formed when atoms share electrons.. Examples – . HCl. , H. 2. O, CO. 2. Ionic Bond. bond formed when an atom gains or loses electrons.. Examples – . NaBr. , . NaCl. , . KBr. By . DR T. . O AKINOLA. PRINCIPLES OF CHEMICAL PREPARATIONS FOR COLD THERAPY AND ENDOTHERMIC REACTIONS. What . is an Endothermic Reaction. You might think of chemical reactions as occurring exclusively in laboratories, but in reality, they occur in the world around us and in our own bodies every day. . Objectives. Compare chemical reactions to physical changes. Compare parts of an atom. Calculate the mass of one mole of an element or compound. Explain how ionic and covalent bonds are formed. Identify the parts of chemical equations.