CHE_106_Lecture16_2009

CHE_106_Lecture16_2009 - Chemistry 106 Lecture 16 Topic:...

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Chemistry 106 Lecture 16 Topic: Periodicity, Charge Chapter 7.1-7.3
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EXAM 2: Chapters 4, 5, and 6 The Second Exam will be held on Thursday October 29 at regular class time (3:30-4:50). The Exam will be held in two locations: Life Sciences Building (LSB) Room 001 Students with last names starting with A-F will meet in LSB. Gifford Auditorium (same as lecture) Students with last names starting with G-Z will meet in Gifford.
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Periodic Table
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Development of the Periodic Table Elements in the same group generally have milar chemical Sulfur similar chemical properties. Physical properties are not necessarily similar, however. Oxygen
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Development of the Periodic Table Dmitri Mendeleev and Lothar Meyer (both in 1869) dependently came independently came to the same conclusion about how elements should be grouped.
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Development of the Periodic Table Mendeleev predicted the discovery of germanium (which he called eka-silicon) as an element with an atomic weight between that of zinc and arsenic, but with chemical properties similar to those of silicon.
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Periodic Properties The periodic law states that when the elements are arranged by atomic number, their physical and chemical properties vary periodically. e will look at three periodic properties: We will look at three periodic properties: h Atomic radius (size of atoms and ions) h Ionization energy h Electron affinity
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Atomic Radius Within each period (horizontal row), the atomic radius tends to decrease with increasing atomic number . Within each group (vertical column), the atomic radius tends to increase with the period number .
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Atomic Radius Two factors determine the size of an atom. One factor is the
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This note was uploaded on 02/09/2010 for the course CHE CHE 106 taught by Professor Korter during the Fall '09 term at Syracuse.

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CHE_106_Lecture16_2009 - Chemistry 106 Lecture 16 Topic:...

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