Quiz4_Key_219 - You may write on this test, but only the...

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Unformatted text preview: You may write on this test, but only the Scantron Form will be scored! Answer the questions on your Scantron form. Each question is worth 2 points. Maximum Score: 40 points 1) Calculate the wavelength (in nrn) of the blue light emitted by a mercury lamp with a frequency of 6.88 x 10“ Hz. A) 675 nm B) 229 nm 0) 485 nm D 206 nm 36 nm 2) Place the following types of electromagnetic radiation in order of increasing frequency. visible light. microwaves, X-rays A) X-rays < visible light < microwaves B) microwaves < X-rays < visible light C) visible light < X-rays < microwaves D X-rays < microwaves < visible light icrowaves < visible light < X-rays 3) Which of the following visible colors of light have the longest wavelength? A yellow red green E) violet 4) How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy? ’34 losml s .99 x 102‘3 photons Ewmhm ; h C .-Q10u0 X ‘0 3'5)ng ) ) 7.99 x 103° photons h >~ — q C) 5.67 x 1023 photons 515 X \ O m D) 1.25 x 103‘ photons q E) None of the above 5 ,5 >( to '4 3 1 O 3:) 5) Determine the velocity of a marble (m = 8.66 g) with a wavelength of 3.46 )(10‘33 rn. h h 11.3mls : RC Vii-Ki ‘3. 22.1 m/s A C)52.9mls to ulmxxow'b 3:3 D) 38.8 mls -—'—/T—‘—/’ amass E) None of the above fi‘mgs {‘0009) K?) AKDX \ m 6) Calculate the energy change associated with the transition from n=4 to n=1 in e hydrogen atom. ‘8 t \ *w 2.04x10'19J _ _ _ - (.__ __ = +3.55x1o-‘9J 13E" 2A8 X '0 J \1 No C) -6.12 x10'19 .1 D) +1.64 x10“ J E) None of the above 7) identify the following orbital: A) s B p3)r d; D) dxa _y: E} dyz 8) Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does not contain an error. A) n = 2, l: 2, m,=0 9) In which orbital below would an electron (on average) be closest to the nucleus? A 2p 3 ) 3p D) 45 E) 5d 10) How many different values of m, are possible in the 4f sublevel? A)5 B)1 11) Use the periodic table to determine the element corresponding to the following electron configuration: [Kr] 5524d1°5p2 D) Ge E) None of the above. 12) Choose the paramagnetic species from below. A) Ca 2.. Nb3+ Zn E) None of the above. 13) Which one of the following atoms contains unfilled forbitals? A) Pb Tl $5 ) Hf E) Po 14) How many valence electrons do the halogens possess? A) 1 5 e 6 E) 2 15) Choose the statement that is TRUE. A) Valence electrons are most difficult of all electrons to remove. B Outer electrons efficiently shield one another from nuclear charge. COre electrons efficiently shield outer electrons from nuclear charge. ) Core electrons are the easiest of all electrons to remove. E) All of the above are true. 16) Place the following elements in order of increasing atomic radius. P, Ba, Cl A) Cl 4. Ba < P B) Ba 4. P < Cl C) Ba 4. Cl < P D) P < Cl < Ba ®C|<P<Ba 17) An electron in a hydrogen atom is excited with electrical energy to an excited state with n = 2. The atom then emits a photon. What is the value of n for the electron following the emission? A)0 a; ma E)4 18) A nickel atom can lose two electrons to form the nickel dication. Experimental evidence revealed that Ni2+ has two unpaired electrons. Using this information, from which subshell were these electrons removed? A) 3d \ @121, Set: \ecr‘rVH-O handout ' 35 E) 3p 19) An old copper penny has a mass of 3 x 1022 times that of a copper atom. Compare the de Broglie wavelength of a penny moving at 0.5 ms to that of a copper atom moving 104 times as fast. The wavelength for the VB @copper atom is 3 x 1018 times that of the penny. } copper atom is 3 x 10‘“5 times that of the penny. See bet 0w 5 C) penny is 3 x 1018 times that of the copper atom. D) penny is 3 x 1026 times that of the copper atom. E) None of the above 20) The condensed electron configuration tor (3r3+ is @[Arfid3 C“: .-= 4 37’ 3) B) [Ar14323d‘ ciiKrlsd" liar Wans‘mon metnm. rC‘mGVQ/ 6‘5 D) [Kr]4523d‘ E) None of the above. m ager ‘0 S beg-0M “'\d o‘th’t—fl\ S ...
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This note was uploaded on 06/25/2008 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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Quiz4_Key_219 - You may write on this test, but only the...

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