# HW2answers pg3 - × 10 15 Hz λ = c ν = 3 × 10 8 m / s 6...

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Cheung, Anthony – Homework 2 – Due: Sep 19 2006, midnight – Inst: McCord 3 1. 1 2. 4 3. 3 correct 4. 0 5. 2 Explanation: 008 (part 1 of 1) 10 points If an electron is conFned to a one-dimensional box 200 pm in length, calculate the wave- length of light required to promote the elec- tron from the ground state to the Frst excited state. 1. 66.5 nm 2. 33.0 nm 3. 44.0 nm correct 4. 26.3 nm 5. 132.0 nm Explanation: L = 200 pm = 2 × 10 - 10 m n = 2 E = n 2 h 2 8 m L 2 E n =1 = (1) 2 (6 . 626 × 10 - 34 J · s) 2 8(9 . 109 × 10 - 31 kg) × p 1 2 × 10 - 10 m P 2 = 1 . 5062 × 10 - 18 J E n =2 = (2) 2 (6 . 626 × 10 - 34 J · s) 2 8(9 . 109 × 10 - 31 kg) × p 1 2 × 10 - 10 m P 2 = 6 . 02479 × 10 - 18 J Δ E = E 2 - E 1 = 4 . 5186 × 10 - 18 J Δ E = h ν ν = Δ E h = 4 . 5186 × 10 - 18 J 6 . 626 × 10 - 34 J · s = 6 . 81949
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Unformatted text preview: × 10 15 Hz λ = c ν = 3 × 10 8 m / s 6 . 81949 × 10 15 Hz = 4 . 39915 × 10-8 m = 43 . 9915 nm 009 (part 1 of 1) 10 points An orbital has a principal quantum number of 3. The magnetic quantum number is-2. What is the shape of the orbital? 1. f 2. d correct 3. p , d , or f 4. p 5. s , p , or d 6. s 7. p or d 8. s or p 9. d or f Explanation: ±or a value of n = 3, the subsidiary quan-tum number l could have a value of 0, 1, or 2. However, the magnetic quantum number has...
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## This note was uploaded on 01/23/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas.

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