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Lecture 9

Lecture 9.pdf

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Thottackad Radhakrishnan

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Lecture 9 Friday, 24 January, 2014 11:03 AM Today's Topics: Announcements: Homework:  Review for Midterm1  When submitting Midterm 1 assignments, put in the Assignment 1 marking TA dropbox (NOT the lab TA dropbox) Lecture Topic: Equations:  λ  Know the elementsin the periodic table:  1-88 minus the transition metals after the first row: ○ All alkali metals ○ All alkaline earth metals ○ First row of transition metals ○ Some post-transition metals ○ All metalloids ○ All non-metals ○ All halogens ○ All noble gases Periodic trends  Ionization energies increase in which direction? Why? ○ Successive ionization energies are higher and have a sudden jump. Why? ○ Why isn't there much of a change in energy in the transition metals? ○ Why is it an irregular increase in IE?  Atomic radii increase and decrease in which direction? Why? ○ How does it change when a neutral atom becomes a positive or negative ion? Componentsof the atom  How was the nucleus discovered?By whom? ○ Describe the experiment, the observationmade, and the inference from the result ○ The experiment and results  How big is an atom? A proton? A neutron? A nucleus? How is the atom arranged? Waves  Energy of wave, wavelength, frequency, wave number, speed of light ○ h, , f, n, c ○ v (new bar) is equal to 1/ - waves in 1 cm  Frequency and wavelength are related how?  What is the wave length region of the visible spectra?  How are wave length and energy of radiation related?  What happens to electronswhen they change orbits?  What is the hydrogen emissionspectrum? ○ How is light formed? Where is the highest energy gap between orbitals? How does this energy ○ Where is the highest energy gap between orbitals? How does this energy gap change between orbitals? ○ To what series does each gap belong to?  What are flame tests? What are they applied to? What is the principle?  What is the Rydberg equation? The Rydberg constant?  What is the photoelectriceffect? What is its related equation? Atomic structure  Bohr theory ○ What are its postulates?  n what? ○ Equations are what? (don't need to know the derivations)  Coulomb's law?  How does the energy change as the value of n increases?  de Broglie: wave-particleduality ○ What is the derivation of the equation? ○ Why are the waves of movementnot observed in larger objects?  Heisenberg Uncertainty Principle ○ What is the principle? ○ What is the equation
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