PDF-Bonding and Electronegativity

LA 1 1 A chemical bond is an attractive force between two atoms This force is due to the electrons from different ato ms interacting with each other The electrons involved in bonding are called v. Co = Together. The Octet Rule. The octet rule says that all atoms want to have eight valence electrons, like the noble gases.. One way that atoms can follow the octet rule is by giving and taking electrons… ionic bonding. The ability of an atom in a molecule to attract shared electrons to itself.. Linus Pauling. 1901 - 1994. Table of Electronegativities. Higher electronegativity. Electronegativity differences determine bond type.. Unit 16. Shapes and Electrical Properties of Molecular Compounds. VSEPR . Theory (4.12). Electronegativity (4.7). Identification of Compounds as Polar or . Nonpolar. (4.13). VSEPR Theory (4.12). The geometry of molecules is important in determining some of their properties. COVALENT BOND. bond. formed by the . sharing . of . electrons . Covalent . Bonds. Between nonmetallic elements of similar electronegativity. .. Electronegativity = how badly an atom wants to add an electron (non metals have higher electronegativity). Metals. Look at the Periodic Table…. 75% of elements are metals!. Metals. They can vary a lot…. General Properties of Metals. Dense. Malleable. Ductile. Good conductors of heat and electricity. Shiny Lustre. Molecular Shapes. VSEPR Theory. From a correct Lewis structure, we can get to the 3-D shape using this theory.. VSEPR stands for . v. alence . s. hell . e. lectron . p. air . r. epulsion.. The theory is based on the idea that e- pairs want to get as far away from each other as possible!. . and Structure. IB Chemistry. Topic 4. . Bond - A force that holds . atoms . together and . makes . them . function as a . unit.. 4.1 Ionic Bonding. An . ion. is a charged particle. Ions form from atoms or from groups of atoms by . Very Important!. Going down the periodic table the properties are affected by INCREASING SIZE and INCREASING DISTANCE between the nuclei and the valence . e-s. Going across a period, properties are affected by the DIFFERING VALENCE, NUCLEAR CHARGE and CHARGE ON THE SPECIES. Activity. Fold your periodic table so that the f and d blocks are looped.. Determine the number of valence electrons for each remaining group (column).. Find the pattern.. Valence Electrons. Valence electrons. B. onds. Polar bond -. A type of covalent bond between two atoms in which electrons are shared unequally, resulting in a bond in which one atom has a slightly negative charge and the other a slightly positive charge.. 4.4.1: Describe the metallic bond as the electrostatic attraction between a lattice of positive ions and delocalized ions. . 4.4.2. : Explain the electrical conductivity and malleability of metals. . Day . 6. – Venn Diagram, . haber. Process. Metallic . Bonding, Properties of Substances reading, . Warm up. ON PAGE 23. What do ionic and covalent bonding have in common? What is different?. Time: . . b)Electro Negativity. . . Anitha. . George Varghese. Dept. of Chemistry. Marthoma. College. ELECTRON . AFFINITY (ELECTRON GAIN ENTHALPY) . Electron gain enthalpy. . is defined as the enthalpy change taking place when an isolated . Nature of coordinative bond. Back-bonding. Bonding of metals to . p. -systems. Valence bond and hybridization. Each bond treated independently from the environment. Resonance concept. Impossibility to explain molecular geometries.