PDF-CHEMISTRY Subject Code P UnitI Periodic properties Atomic radius ionic radius ionization

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. 1. . What . are the trends for ionization energy? Why do these trends exist?. 2. . As you go across a period, do elements get better or worse at attracting electrons? . Justify. . your response.. 3. 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. 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.. 1.c. – Students know how to use the periodic table to identify alkali metals, alkaline earth metals and transition metals, trends in ionization energy, electronegativity, and the relative sizes of ions and atoms.. The most awesome chemistry tool ever!. Unit Objectives:. Understand the history of who built up the periodic table, how they did it, and what law was made. Become familiar with structure of periodic table, how the e. Electrons are transferred from an atom of low electronegativity to one of high electronegativity. Anion (-) and cation ( ) formed. Opposite charges attract – called an . electrostatic force. Formula Unit. Elemental Properties and Patterns. The Periodic Law. Dimitri. Mendeleev (1869/1871) was the first scientist to publish an organized periodic table of the known elements.. He was taking a chemistry course in Russia and tried to find a way to organize the periodic table. . Periodic table. Elements are arranged based on similarities in their properties. Dmitri Mendeleev is credited with our current periodic table. Even predicted the existence of elements that were not yet discovered(i.e. Gallium). What patterns exist on the periodic table?. Lesson Essential Question:. The Basics. The Basics. Metals, Nonmetals, Metalloids. There is a zig-zag or staircase line that divides the table.. Metals are on the left of the line, in . 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 . function of their atomic weights. History. Organization. Introduction to . Bonding. Trends. Terms. The Periodic Law. States that the physical & chemical properties of the elements are periodic functions of their atomic numbers.. The Periodic Table. . 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 .