CHAPTER 7 MAKE UP HOMEWORK

# CHAPTER 7 MAKE UP HOMEWORK - n = 2 7. The human eye...

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CHAPTER 7 MAKE UP HOMEWORK 1. The distance from the sun to the Earth is 1.496 x 10 8 km. How long does it take loght to travel from the sun to Earth? 2. Determine the energy of 1 mol of photons for each of the following kinds of light? a. infrared radiation (1500 nm) b. visible light (500 nm) c. ultraviolet radiation (150 nm) 3. Calculate the wavelength of an electron traveling at 1.15 x 10 5 m/s. 4. Calculate the de Broglie wavelength of a 143 g baseball traveling at 95 miles per hour. 5. Which set of quantum numbers cannot occur together to specify an orbital? a. n = 2, l = 1, m l = -1 b. n = 3, l = 2, m l = 0 c. n = 3, l = 3, m l = 2 d. n = 4, l = 3, m l = 0 6. Calculate the wavelength of the light emitted when an electron in a hydrogen atom makes each of the following transitions and indicate the region of the electromagnetic spectrum where the light is found. a. n = 2 n = 1 b. n = 3 n = 1 c. n = 4 n = 2 d. n = 5
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Unformatted text preview: n = 2 7. The human eye contains a molecule called 11-cis-retinal that changes confirmation when struck with light of sufficient energy. The change in confirmation triggers a series of events that results in an electrical signal being sent to the brain. The minimum energy required to change the confirmation of 11-cis-retinal within the eye is about 164 kJ/mol. Calculate the longest wavelength visible to the human eye. 8. Find the velocity of an electron emitted by a metal whose threshold frequency is 2.25 x 10 14 s-1 when it is exposd to visible light of wavelength 5.00 x 10-7 m. 9. Give the electron configurations for the following elements: a. P b. Ge c. Zr d. I 10. Name an element in the third period (row) of the periodic table with: a. three valence electrons b. four 3p electrons c. six 3p electrons d. two 3 s electrons and no 3p electrons...
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## This note was uploaded on 07/22/2008 for the course CHEM 105A taught by Professor Bau during the Summer '04 term at USC.

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