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Unformatted text preview: Chemistry 20A1 Professor Scerri Midterm 2 Nov, 2003 PROBLE M SCORE POINTS 1 20 2 17 3 12 4 18 total 67 Name _____________________ Signature __________________ ID #_______________________ Name ________________________________ 2 Instructions : This exam has 4 questions plus a periodic table at end of exam. Verify you have the right number of pages before you begin. Write your name on each page. Raise your hand if you don’t understand a question. SHOW YOUR WORK ! No credit will be given for an unsubstantiated or illegible answer. Write legibly, use proper units throughout and use significant figures in all answers. For questions requiring explanations do not exceed the line limit shown by dotted lines. If you do it will not even be read by the grader! Possibly useful information : 12 inches = 1 foot, 2.54 cm = 1 inch. h = 6.63 x 1034 J sec N o = 6.02 x 10 23 mol1 c = 3.00 x 10 8 m sec1 m e = 9.11 x 1031 kg 1 a.m.u. = 1.66 x 1027 kg 1 ¯ = 1010 m g = 9.81 m/s 1 eV = 1.602 x 1019 J V electrostatic (r) ∝ Q 1 Q 2 /r; K.E. =1/2mv 2 = p 2 /2m F =  ∆ V/ ∆ r λν = c ∆ E = E f E i = ε photon = h ν h ν = h ν ο + K. E.(electron) λ mass = h mv = h p m ∆ v ∆ x = ∆ p ∆ x ≥ h 4 π Probability density =  Ψ n (r) 2 E n = (2.18 x 1018 J)Z eff 2 /n 2 ; r n = (0.529 ¯)n 2 /Z eff nl1 spherical (radial) nodes; l angular nodes; n1 total nodes...
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This note was uploaded on 04/02/2008 for the course CHEM 20A taught by Professor Scerri during the Fall '05 term at UCLA.
 Fall '05
 Scerri
 Periodic Table

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