PPT-Electronegativity?

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. 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.. 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. Trends and Similarities. Trends of the Periodic Table:. At the conclusion of our time together, you should be able to:. . Give a trend across and down the Periodic Table for metallic characteristics, reactivity, atomic radius and ion radius, . Conceptual Reminders: Waves/Blackbody Radiation Energy. Example. A lamp rated at 40.0 J/sec emits violet light of wavelength 422 nm. What is the energy of the photons? How many photons of violet light can the lamp generate in 2.0 sec?. 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. If we can’t see the electron, and it has no mass, then why is it important?. BONDING!. Electrons are the only particle that participate in bonding between atoms.. How do we know when and how things will bond, though?. Electron Configuration and Periodic Properties. Electron Configuration and Periodic Properties. Objectives: . Define atomic radius and ionization energy.. Compare the periodic trends of atomic radii and ionization energy.. 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. Laws of periodic table. Modern periodic law . Periodic law. The physical and chemical properties of elements are periodic . function of their atomic numbers.. The physical and chemical properties of elements are periodic . 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?. 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 .