exam2 - 1 Chemistry 6 Name_ No other books or papers are to...

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1 Chemistry 6 Name_______________________________________ No other books or papers are to be used. Show all work. The awarding of full credit will require that numerical answers be supported by a clear presentation of the steps used. Include units where appropriate. A periodic table is appended to the end of the exam. E = h ν c = λν E = 109678cm -1 Z 2 n 2 P = h λ x p h 2 p = mv E = R( 1 n f 2 - 1 n i 2 ) K.E. = 1 2 mv 2 = p 2 2m E = φ + 1 2 2 V sphere = 4 3 π r 3 R = 109678cm -1 c = 3 x 10 8 m s e = 1.60 x 10 -19 Coulombs 1Å = 10 -8 cm 1nm = 10 -9 mm electron = 9.11 x 10 -31 kg N A = 6.02 x 10 23 mole h = 6.62 x 10 -34 J s 1J =5.03 x 10 22 a o = 0.530Å Question 1 (a) (10 points) All of our discussions involving the photo electron effect used metals as examples, but the effect may also be observed in gases. Calculate the kinetic energy of a photoelectron ejected from the ground state of the He + ion by electromagnetic radiation (i.e., light) with λ =100Å. (b) (5 points) The maximum kinetic energy observed when electrons are ejected from potassium by light of frequency, ν , equal to 8.0 x 10 14 s is 3.6 x 10 -19 J.
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exam2 - 1 Chemistry 6 Name_ No other books or papers are to...

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