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set 4 solns

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Department
Chemistry
Course
CH110
Professor
Quinn Major
Semester
Fall

Description
Problem set # 4-Solns Multiple choice Questions… 1. The energy levels of the hydrogen atom (and all atoms) are ______________, meaning that only certain discrete energy levels are allowed. a. varied b. quantized c. ramp-like d. continuous e. two of these 2. Which color of visible light has the least amount of energy per photon? a. violet b. blue c. green d. yellow e. red 3. The form of EMR that has less energy per photon than infrared rays but more energy per photon than radio waves is a. microwaves b. ultraviolet c. gamma rays d. X-rays e. none of these 4. The distance between two successive peaks or troughs in a wave is called a. the frequency b. the wavelength c. the speed d. the amplitude e. none of these 5. The ______________ is a phenomenon that may be caused by the burning of fossil fuels, which increases the CO content in the earth’s atmosphere. 2 a. acid rain b. greenhouse effect c. infrared radiation d. ozone problem e. none of these 6. ______________ is a form of oxygen that protects us from high-energy radiation emitted by the sun. a. Ozone b. Carbon dioxide c. Ultraviolet light d. Methane e. None of these 7. Which of the following is a reasonable criticism of the Bohr model of the atom? a. It makes no attempt to explain why the negative electron does not eventually fall into the positive nucleus. b. It does not adequately predict the line spectrum of hydrogen. c. It does not adequately predict the ionization energy of the valence electron(s) for elements other than hydrogen. d. It does not adequately predict the ionization energy of the first-energy-level electrons for one-electron species for elements other than hydrogen. e. It shows the electrons to exist outside the nucleus. 8. The probability map for an electron is called a. an orbit b. a photon c. an orbital d. an electron configuration e. none of these 9. A given set of f orbitals consists of ______________ orbital(s). a. 1 b. 3 c. 5 d. 7 e. 9 10. The maximum number of electrons allowed in each of the d orbitals is a. 2 b. 4 c. 8 d. 18 e. 32 11. The maximum number of electrons allowed in the fourth energy level is a. 2 b. 4 c. 8 d. 18 e. 32 12. Which of the following is an incorrect designation for an atomic orbital? a. 1s b. 4f c. 3s d. 2d e. 2p 13. What is the maximum number of electrons that can be put into each of the following subshells? a. 3p ______________ b. 6s ______________ c. 5d ______________ d. 7f ______________ ANSWER: a. 6 b. 2 c. 10 d. 14 14. The number of d orbitals in the second principal energy level is a. 2 b. 6 c. 10 d. 14 e. none of these 15. Phosphorus has how many electrons in its outermost principal energy level? a. 1 b. 2 c. 3 d. 5 e. 15 16. Which of the following is the highest energy orbital for a silicon atom? a. 1s b. 2s c. 3s d. 3p e. 3d 17. How many electrons are in the third principal energy level (n = 3) of one atom of Fe? a. 2 b. 8 c. 14 d. 18 e. none of these 18. Which element has the fewest number of electrons in its valence shell? a. Cs b. Mg c. P d. O e. Br 19. Which one of the following atoms has a partly filled d sublevel? a. Ca b. Ni c. Zn d. As e. Ar 20. When moving down a group (family) in the periodic table, the number of valence electrons a. remains constant b increases by 2 then 8 then 18 then 32 c. doubles with each move d. decreases regularly e. changes in an unpredictable manner 21. Which statement is not true? A. The values of l range from 0 to (n-1). B. The number of possible values for l describes the number of subshells in a shell. C. The first four subshells that correspond to l=0, 1,2, and 3 are s, p, d and f. D. In the shell n=2, thereis 1 subshell. In the second shell, there are two subshells. These are the s and p subshells. Choices A, B, and C are correct descriptions of the angular momentum quantum number. 22. The magnetic quantum number does NOT” A. describe the spin of the electron. B. give the particular orbitals ina subshell. C. Have values which range from -1 to +1 D. suggest that there are always odd numbers of orbitals ina subshell. Choices B, C and D are all correct and describe the magnetic quatum number. Choice A describes the spin quatum number. 14 23. What is the wavelength of radiation that has a frequency of 6.912  10 /s?
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