# Lecture 7 - Topics for the day Administrative stuff...

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Quest Quest HW one and Sample exam one are posted http://quest.cns.utexas.edu/ Download the homework or work online. You can enter answers and come back and fnish later You get instant Feedback on your answers. IF you are wrong, you can reattempt it, but For partial credit. Don’t guess. You eventually lose points iF you reattempt too many times. Answer key is posted once due date is past (5 pm ±riday) ALEKS ALEKS prep assessment should be complete today. Improve your score 70% by Mar 29th For the fnal 2% ALEKS homework is here: http://www.aleks.com Sign up as a new user, pay \$40 Use this course code: MVPRP-QKPNU ±irst objective due ±riday ±eb 2/12 70% oF topics For Full marks on that homework This is current, not prerequisite topics. Assessments are HARD to see what you do not understand. Where were we? Schrödinger’s equation is the fundamental equation of quantum mechanics that describes the location and energy of tiny particles. 8mL 2 n 2 h 2 E n = Ψ n = sin( x) L n π L 2 Solving Schrödinger’s equation in one-dimension for the particle in a box resulted in a set of wavefunctions , each with an associated energy: Each wavefunction Ψ describes an orbital. Ψ 2 gives us the probability that the electron can be found at a speciFc position. If Ψ 2 = 0, the point is a node and there can be no electrons at that point. 4 5 6
The solution to the Schrödinger’s equation in three dimensions for an electron in a hydrogen atom has many solutions. To describe them all, we use three different quantum numbers that can be used to predict the size, shape, and orientation of each of the possible wavefunctions (orbitals). A.

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Lecture 7 - Topics for the day Administrative stuff...

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