Lecture 8 - Topics for the day Administrative stuff Darwin...

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Unformatted text preview: Topics for the day Administrative stuff Darwin day Exam One Results Problem questions (graded iclicker questions) Effective nuclear charge & Periodic trends revisited Electron afFnity Ionic radii Periodic table groups Chemical Bonding Administrative stuff Reminder DrRuth Friday Ofce hours CANCELLED this week (AISD holiday). Extra ofce hour next week to make up. Monday 1 - 2 pm. Reminder to those of you who need makeups for all four exams. Documentation needed by Tuesday. Happy Darwin Day! 1018 US citizens surveyed 1018 US citizens surveyed http://www.tfn.org/site/PageServer?pagename=SUFSactivisttoolkit Texas Freedom Network Stand up for Science supports a sound science education for Texas public school children The religious right has tried to frame the debate over evolution as a battle between science and faith. Yet many people of faith see no conict between accepting the science of evolution and their belief in God. Seven of the 15 members of the State Board of Education declare as far-right. Governor Perry appointed a biblical creationist as the boards chairman. They set the science curriculum standards for the state. This determines textbook content. Texas is so large that whatever decision is made about approved science textbooks for schools inuences the entire nation. Exam One! CH301: Exam 1 5 10 15 20 25 30 35 40 10 20 30 40 50 60 70 80 90 100 % score Number of students Class Average 73% Two students made 100% I am happy with this for a Frst exam! Quantum is the hardest topic of the semester You get to drop your worst exam HW and participation will nudge your grade up Hard work and study will help even more! A 15% B 23% C 25% D 18% F 19% 1/3 of the questions, worth 1/3 of the total were correct for 90% of the class. our questions, worth 1/6 of the total were wrong for 50% of the class. Lets see how many of you went and looked up the right answers after the test... iClicker Time A. Macroscopic objects have very large energy spacings, too large to be observed by available scientifc means. B. We CAN observe quantum eFFects with macroscopic objects. C. Their deBroglie wavelengths and energy level spacings are orders oF magnitude too small to be measured. D. Macroscopic objects have continuous energy levels, not quantized energy levels. E. The Heisenberg uncertainty principle states that we cannot observe these quantum eFFects precisely. Why dont we observe quantum eFFects with macroscopic objects? GRADED C. Their deBroglie wavelengths and energy level spacings are orders oF magnitude too small to be measured. iClicker Time A. velocity and distance B. ionization energies C. quantum numbers D. photoelectric effect E. photon energies Each solution to the Schrodinger wavefunction equation may be described in terms of?...
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This note was uploaded on 04/18/2009 for the course CH 52375 taught by Professor Ruth during the Spring '09 term at University of Texas at Austin.

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Lecture 8 - Topics for the day Administrative stuff Darwin...

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