PPT-4.3 Covalent Structures IB Chemistry SL

Mrs Page Essential Idea Lewis electron dot structures show the electron domains in the valence shell and are used to predict molecular shape Nature of Science Scientists use models as representatives of the real world the development of the model of molecular shapes VSEPR to explain observable properties. Contents . Atomic models. Properties of electrons . Bonds . Lewis . Law. Atomic Mass. Molecular mass. Atomic number. Octet Law. Valence. Ionic bonds. Covalent bonds. Reactions –balance. Mass conservation law. Unit 1 – Chemical Changes and Structure. Bonding and Structure. The Formation of Bonds. Bonds. are . electrostatic forces. (attractions between positive and negative charges) which hold atoms together.. . Ionic (Atomic) Radii & Coordination Number (CN). Ionic radius: . Hypothetical radius (size) of an ion (. cation. or anion). Calculated values from the bonding distances. CN. Number of one kind of the bond forming ions (atoms) surrounding the other, which are forming the first direct bonding. What is the arrangement of the electrons around each chlorine atom in Cl. 2. ?. 2, 8, 8. This is the same as the electron configuration of an atom of which noble gas?. Argon. When atoms bond . covalently. Ms. . Grobsky. Chemical Bonding. Bonding is the interplay between interactions between atoms. Energetically favored. Electrons on one atom interacting with protons of another atom. Energetically unfavorable. C2- Chemistry. Covalent bonds, covalent structures, metals, . nanoscience. This is the . transfer. of electrons between atoms. . The atoms become ions because they have lost or gained electrons.. Ionic Bonding. Bonding. Bonding models for methane, CH. 4. . Models are NOT reality. Each has its own strengths and limitations.. Ga . Standards. Students know . atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds.. Nursing students. Chapter 1. Introduction into organic chemistry . Bonding and isomerism. 1. Chapter 1. Bonding and Isomerism. Atoms consist mainly of:. Nucleus:. (containing Protons and Neutrons). . What do these images have in common?. How are they different?. What do you know about the uses of graphite and carbon?. Learning questions. What are giant covalent molecules?. How are they similar/ different from each other?. By: Andres F Sanchez. Molecular Orbital!. Molecular Orbital- . The space that shared electrons move in. Covalent Bond- . when two atoms share electrons. Energy and Stability. Most atoms have low stability except noble gases. STANDARD C: (CHAPTER 4) TYPES OF BONDING: Comparing and contrasting ionic, covalent and metallic bonding. Identifying the properties associated with each type of bond.. LG (a) Describe an ionic bond between atoms.. Text:. Ch 8 (all except sections 4,5 & 8). Ch 9.1 & 9.5. Ch 10.1-10.7. My Name is Bond. Chemical Bond. PART 1: . Ionic & Covalent Bonding. Chemical Bonds. A chemical bond is an attraction between 2 atoms or ions.. Covalent Bonds. Covalent bonds:. occur between two or more . nonmetals. ; electrons are . shared. not transferred (as in ionic bonds). The result of sharing electrons is that atoms attain a more stable electron configuration.. 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..