test_1b - 3.09; Fall Term 2004 Test #13 ’ "‘...

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Unformatted text preview: 3.09; Fall Term 2004 Test #13 ’ "‘ page 2 Problem #1 (29%) J,” (a) In box notation. give the complete ground-state electron configuration of each of the following gas-phase species. You may use noblewgas abbreviations for the inner shells, ifyou wish. (0 Mag— 6 [4/6] £11 @1 (smelt ¢ P 5%] gr: (b) Give the chemical identity of the species with these ground-state electron configurations: (i) a neutral atom with [XCHfHSdméS26p3 E» (ii) an atom with net charge 2— and [Kr155' '1 __ 3r (iii) an atom‘zith net charge 2— and the PES spectrum shogn 2- ’6 I 1 7’ £54: £113 /5 as 4» 3s =3 We—// le :25 «"71, w MW 2-— => 27,, -- flu“? UUL 3* I; be A ' 5 2' .w‘l g .. 3‘- ? 0’30 4— l. :w-nol: (c} For each of the following pairs, ( I) identify the larger atom or ion and {2) give a brief explanation justifying your choice. we 3e 2: A” M7)» anagram [a] 2s?- M 5:2. M W QQHLEZZE] m m 3420250»: I» «17 /7---/ Mod (iill'lealtdB€2+ ,r Wflm <3.“ dim/mam 644/— 5ewm 55p" flaw/fig a\( 2/1‘ .: 332""me an, W- 15— 3.09! Full! Tenn 2004 Test #13 page 3 (Problem #2 (l4 %) (a) Sommerfeld introduced two new quantum numbers, l and m. to address certain shortcomings of the Bohr model. By invoking either I or m. explain the observation of Starck that in an applied electric field certain lines in the spectrum of atomic hydrogen appear to split into multiples. (b) Making reference to the underlying physical principle. describe how a beam of cadmium cations {Cd+] would behave in the Stern-Gerlach experiment (passage of a beam of atoms through a divergent magnetic field). 9“ A“ igfiée/Péw‘a 0/71, M24 44 7' fife/WA 8" {of/7m t W I‘M dx/a m 'c 1540!! 97‘ 46% 471% m float (a 5’2 (oi-JET firm %Mr 3.09} Full Term 2004 Test #! B page 4 Problem #3 (34 %) ,1“ (a) Mercury vapor is analyzed by photoelectron Spectroscolay (PBS) using electromagnetic radiation of wavelength (M 9.15 x 10—8 m. Calculate the de Broglie wavelength (kg) of the photoeleclrons associated with the first ionization energ =. fflCx‘M @ 23 pm 9 flaws '2. L .. “’3' «40—. IE-f'j :25 A .— £9-2‘Er—Dai" ZINC/£9. 3?" 2:)?- m?“ A T‘IE acute—3'; ._ —-/o waw—sr g.‘m—a¢,3xz¢8 fi@mfiéw—&)) ~67£xxo ac ?-/rxro"3 (h) In the emission spectrum of Li2+ calculate the lowest wavenumber (V J involving electron transitions between H = 4. 5i and 6. 3.09] Full Tern-z 2004 Test #13 page 5 Problem #4 (2.3 070) The reaction of sodium (Na) with tantalum pentachloride (TaCls) at 300°C can produce tantalum (Ta) along with sodium chloride (NaCl). A reactor is charged with 999 kg of TaClfi and 22.2 kg of sodium. and the reaction is driven to completion. Calculate how much of each species is present at the end of the reaction. Express your answer in kg. Siva-#756? “'73: + 57W? 19:“). Z waver Au m = 3(840 ML:- 2—12-99 M362 5‘ YEW ca = 3574—? 77? 7549's,— + 2.22? Aid, +4; m9. 1/ .4; W. ...
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test_1b - 3.09; Fall Term 2004 Test #13 ’ &amp;quot;‘...

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