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Unformatted text preview: Girish Toofany- Chem121/120 2008-3 Surrey Le 1 Assignment 5. Due date: Sat Oct 11 23:59:00 2008 2 point(s) Light A visible emission spectral line for sodium occurs at λ =589.0 nm. What is the frequency ( ν ) of this light? You are correct. Your receipt is 167-8308 What is the magnitude of the energy change associated with the emission of one mole of photons of light with this wave- length? You are correct. Your receipt is 167-1311 2 point(s) The Photoelectric Effect The energy required to remove an electron from a surface of a solid element is called its work function . If a minimum of 431.3 kJ/mol is required to remove electrons from Cu atoms on a surface of a sample of copper, what is the maximum wavelength ( λ max ) of light that can remove an electron from a Cu atom on this surface? You are correct. Your receipt is 167-7148 If the same copper surface is irradiated with light of λ =226.2 nm, what is the maximum kinetic energy that a released elec- tron could have? You are correct. Your receipt is 167-8720 2 point(s) Particles and Waves The diffraction of radiation can be used to determine the spacing between atoms. In practice, the wavelength of the radiation used should be restricted to a value which is of the same order of magnitude as the interatomic distances to be determined. Such experiments are commonly performed using X-rays (electromagnetic radiation), however a beam of subatomic particles, such as of neutrons or electrons, may also be used if their corresponding de Broglie wavelength is...
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This note was uploaded on 06/27/2009 for the course CHEM CHEM 121 taught by Professor Peggy during the Spring '09 term at Simon Fraser.
- Spring '09