20070917 Day Lecture 06_1

20070917 Day Lecture 06_1 - Todays Plan Welcome to CHM...

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1 Welcome to CHM 1220/1225 Please turn off cell phones pages iPods Thank you! Today’s Plan Announcements Complete Chapter 8 Next Assignment(s) • Pre-lecture Assignment 06 will be available at 2:00 p.m. today and is due by noon, Wednesday, September 19, 2007. • Chapter 8 Homework is due by 12:50 p.m. Wednesday, September 16, 2007 • Chapter 1-4 Quizzes are available and are due by noon, Monday, September 24, 2007 Chapter 8 Electronic Structure of the Atom Electronic Structure of Atoms 8.1 Electron Spin and the Pauli Exclusion Principle 8.2 Building-Up Principle and the Periodic Table 8.3 Writing Electron Configurations Using the Periodic Table 8.4 Orbital Diagrams of Atoms; Hund’s Rule Periodicity of the Elements 8.5 Mendeleev’s Predictions from the Periodic Table 8.6 Some Periodic Properties 8.7 Periodicity in the Main-Group Elements Figure 8.17: Representation of atomic radii (covalent radii) of the main-group elements. ? Refer to a periodic table and arrange the following in order of increasing atomic radius: Br, Se, Te 35 Br 34 Se 52 Te Te is larger than Se. Se is larger than Br. Br < Se < Te
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2 The first ionization energy of an atom is the minimum energy needed to remove the highest energy (outermost) electron from a neutral atom in the gaseous state to form a cation. Successive ionization energies correspond to the minimum energy required to begin with a cation and remove the next electron. Trends Within a group, ionization energies decrease. This follows the trend in size: it is easier to remove an electron that is farther from the nucleus. Trends
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This note was uploaded on 02/02/2010 for the course CHM 1220 taught by Professor Barber during the Spring '07 term at Wayne State University.

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20070917 Day Lecture 06_1 - Todays Plan Welcome to CHM...

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