Lect19_drobny_11 - Lecture 19 Periodic Trends Reading...

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Lecture 19: Periodic Trends Reading: Zumdahl 12.14-12.15 Recommended Problems:12.81,12.83,12.87 Exam on 2 Dec. – See Study Guide (3 pages). It will be covered at Discussion Sections and at the Th (1 Dec.) review session. – Exam 2 Covers: 10.11,10.12, 11.1-11.4, 12.1-12.10; Lectures 12-18 – Lectures 19-23 covering 12.15 and 13.1-13.13 will be covered on the fnal exam Outline – Periodic Trends • Ionization Energy, Electron AFfnity, and Radii – A Case Example
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Periodic Trends • The valence electron structure of atoms can be used to explain various properties of atoms. • In general, properties correlate down a group of elements. • A warning: such discussions are by nature very generalized…exceptions do occur.
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Periodic Trends: Ionization • If we put in enough energy, we can remove an electron from an atom. • The electron is completely “removed” from the atom (potential energy = 0).
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Periodic Trends: Ionization • Generally done using photons, with energy measured in eV (1 eV = 1.6 x 10 -19 J). • The greater the propensity for an atom to “hold
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Lect19_drobny_11 - Lecture 19 Periodic Trends Reading...

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