PPT-Electronegativity

What is electronegativity The ability of an element to attract bonding electrons to itself What does that mean What is electronegativity The ability of an element to attract bonding electrons to itself. Electronegativity is a very useful concept for predicting whether the bonding between two atoms will be ionic covalent or metallic brPage 5br G Cl G G G brPage 6br Cl Cl Cl Cl brPage 7br Cl Cl Cl G G G G G G brPage 8br LI57347ERQG57347GLSROHV5734757 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. 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. Polarity and Electronegativity. Think about it. What does the word POLAR mean to you?. Polar Bear North/South Poles. Polar Molecules. What is Electronegativity?. Electronegativity:. . How much an atom in a molecule attracts electrons. How does your sense of smell work? . If a molecule fits into a receptor site in your nose, should all things smell? Why do you think you don’t smell the molecules of O. 2. , N. 2. , or CO. 2. in the air? . WHAT TYPE OF BOND DO ALUMINUM AND CHLORINE FORM?. AlCl. 3. Aluminum Chloride. WHAT TYPE Of BOND DO ALUMINUM AND CHLORINE FORM?. Ionic: . Metal and . NonMetal. AlCl. 3. Aluminum Chloride. WHAT TYPE Of BOND DO ALUMINUM AND CHLORINE FORM?. F. 2. yellow gas. very reactive. toxic . Cl. 2. green gas. very reactive. toxic . Br. 2. orange liquid. very reactive. toxic . often used as a solution in water - bromine water, Br. 2. (. aq. ). I. 2. 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.. (bring notes to show me next lesson). ;. Read pages 60 – 62 in your text book. Complete the questions at the end of each double page spread. Look at the following websites. http://www.chemguide.co.uk/atoms/bonding/electroneg.html#top. Polarity. The electronegativity. values of representative elements . in Group . 1A (1) to Group 7A (17). .. Learning . Goal . Use electronegativity to determine the polarity . of . a bond.. Electronegativity. p. olarity. CHE2060 Topic 1: Atoms, orbitals & bonding. Bond polarity & . electronegativity. Covalent bonds can be either . polar. or . nonpolar. depending on how equally. (or unequally) their e- pair bonds are shared between the 2 bonded atoms.. . 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 .