PPT-Lewis Theory Chapter 9 Chemical Bonding I

Bonding Theories Explain how atoms bond together to form molecules Explain why some combinations are stable and others are not Table salt NaCl Not NaCl 2 Water is H 2 O Not H 3. VB theory MO theory applications Comparision of VB and MO theories VSEPR theory Bond order Bond energy Bond length Bond polarit y Partial ionic character of bonds The concept of multicentre bond Electron deficient compounds Hydrogen bond I 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.. What types of things bond together?. Think-pair-share with your neighbor all of the things that bond together.. Share with entire class. What would happen if the bonds didn’t hold or were weak?. Bonding. CHEMICAL BOND – A force that holds two or more atoms together as a unit. Individual atoms will naturally bond together to achieve a lower energy state (to be more stable). 3B-1 (of 42). TYPES OF BONDS. Culture of Poverty: . There are economic, social, and psychological traits that define the culture of poverty. Lewis specifically described the culture of poverty through a set of seventy interrelated traits. The culture of poverty can be explained as, “The way the poor adapted to their environment, the strategies they used to care with feelings of ’hopelessness and despair,’ a result of their ‘realization of the improbability of achieving success’ in class-stratified cities undergoing rapid technological change.” . Gilbert Newton Lewis. . American chemist . October 25, 1875 - March 23, 1946. "I have attempted to give you a glimpse...of what there may be of soul in chemistry. But it may have been in vain. Perchance the chemist is already damned and the guardian the blackest. But if the chemist has lost his soul, he will not have lost his courage and as he descends into the inferno, sees the rows of glowing furnaces and sniffs the homey fumes of brimstone, he will call out-: '. Jennie L. Borders. Section 8.1 – Molecular Compounds. A . covalent bond. is formed between atoms held together by . sharing. electrons.. A . molecule. is a group of atoms joined by . covalent bonds. Covalent bonds . result from the . sharing . of electrons. between two atoms.. A covalent bond is a . two-electron bond . in which the bonding atoms share valence electrons.. A . molecule . is a discrete group of atoms held together by covalent bonds.. Chapter 9. Copyright © The McGraw-Hill Companies, Inc.  Permission required for reproduction or display.. 2. Valence electrons. are the outer shell electrons of an . atom. The valence electrons are the electrons that. Types of Chemical Bonds. Ionic bonds. : attraction between positive and negative ions (e- are lost or gained. ). m. etal + nonmetal (K. 2. O). Covalent bonds. : . sharing. of electrons between two . PS21. Friday, January 27, 2017. Worst Taught Science Topics in Middle and High School Chemistry/Physical Science?. 1) Electronic structure (Bohr model) of the atom. 2) Eight electron rule for chemical bonding. Do . Now: Identify . Bond Type from Formula. Au. Ag. CO. 2. Li. 3. N. Na. 2. S. Mg. CsF. H. 2. O. NaCl. SO. 2. Cu. CH. 4. Covalent. Covalent. Covalent. Covalent. Ionic. Ionic. Ionic. Ionic. Metallic. Coverage of Chapter 991 All92 All93 All94 All95 Omit Hybridization Involving d Orbitals96 All97 and 98 Omit ALLnnThe shape of a molecule plays an important role in its reactivityBy knowing Jennie L. Borders. Section 8.1 – Chemical Bonds, Lewis Symbols, and the Octet Rule. Whenever two atoms or ions are strongly attached to each other, we say there is a chemical bond between them.. There are three general types of chemical bonds: ionic, covalent, and metallic..