Math Tune Up Atomic Emission Spectra and Photons T U T O R M A T H 152 Chapter

# Math tune up atomic emission spectra and photons t u

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Math Tune-Up: Atomic Emission Spectra and Photons T U T O R M A T H 152 Chapter 5 • Assessment 5 Assessment * Solutions appear in Appendix E P R O B L E M S O N L I N E Lesson by Lesson 5.1 Revising the Atomic Model Why was Rutherford’s model of the atom 27. known as the planetary model? 28. What did Bohr assume about the motion of electrons?Describe Rutherford’s model of the atom and 29. compare it with the model proposed by his student Niels Bohr. 30. What is the signi fi cance of the boundary of an electron cloud? What is an atomic orbital? 31. Sketch 1 32. s , 2 s , and 2 p orbitals using the same scale for each. 33. How many orbitals are in the 2 p sublevel? 34. How many sublevels are contained in each of these principal energy levels? n a. ý1 c. ný3b. ý2 d. ný4 n 5.2 Electron Arrangement in Atoms 35. What are the three rules that govern the fi lling of atomic orbitals by electrons? 36. Arrange the following sublevels in order of increasing energy: 3 d , 2 s , 4 s , 3 p . 37. Which of these orbital designations are invalid?4 2 What is the maximum number of electrons that 38. can go into each of the following sublevels? 2 a. s e. 3 p 4 b. s f. 3 d 4 c. p g. 5 s 4 d. f h. 5 p 39. What is meant by 3p3?Write electron configurations for the elements 40. that are identi fi ed by these atomic numbers: 7 9 Give electron con fi gurations for atoms of these 41. elements: Na a. c. I K b. d. Ne 42. How many electrons are in the highest occupied energy level of these atoms?barium aluminum How many electrons are in the second energy 43. level of an atom of each element? chlorine a. phosphorus b. potassium c. 44. Write electron configurations for atoms of these elements:selenium a. c. vanadiumb. d. calcium titanium 5.3 Atomic Emission Spectra and the Quantum Mechanical Model Use a diagram to illustrate each term for a wave. 45. wavelength a. amplitude b. cycle c. What is meant by the frequency of a wave? 46. What are the units of frequency? Describe the relationship between frequency and wavelength. 47. Consider the following regions of the electro- magnetic spectrum: (i) ultraviolet, (ii) X-ray, (iii) visible, (iv) infrared, (v) radio wave, (vi) microwave. Use Figure 5.8 to arrange them in order of a. decreasing wavelength. How does this order di ff er from that of b. decreasing frequency? List the colors of the visible spectrum in order 48. of increasing wavelength. How did Planck in fl uence the development of 49. modern atomic theory? 50. Explain the di ff erence between a photon and a quantum. 51. What has more energy, a photon of infrared light or a photon of ultraviolet light? * * * * * * * * * * * * * Electrons in Atoms 153 52. What is the energy of a photon of green light with a frequency of 5.80 10 14 /s? 53. Explain the di ff erence between the energy lost or gained by an atom according to the laws of classical physics and according to the quantum model of the atom.  • • • 