Quiz1-3 A04

Quiz1-3 A04 - 7/ ‘0 ’hr 4.2 ~/ -1 Note: Don’t forget...

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Unformatted text preview: 7/ ‘0 ’hr 4.2 ~/ -1 Note: Don’t forget about UNITS!!! Good luck. 1. Fill in the blanks (6 pts) Nonmetal W v a, Potassnum -_ m 2a) Arrange the following types of radiation in order of decreasing wavelength n the line below: yellow, x-rays, red, blue, ultraviolet, infrared, and microwaves (2 ms) - \ , /Z w r JN‘ micm > {9‘ > rel,L > caglloto> bit/L6 > (AU > Kf% Md“ ' a 7— V1. b) Calculate the wavelength of light (in with a fi‘equency of 5.15 X 108 MHz. What color is this light given it’s one from your sequence above and Led=702nm? What energy would a photon of this light carry? (2pts each) E C ‘5 9 V \ x [0 g m 13. , Q 5 9/7 7‘ 3 6.3?)Xl01m C5. 15v tot/14H? y ELIE t MH—z j @aém gh r/l'vv ring : (ooze X‘lO‘ZHJ'S)C%XlDSM/S) 2 « (amm m) Wavelength Color Energy 3) If the Thomson model of the atom had been correct, Rutherford would have observed: (2pts) lpha particles going through the foil with little or no deflection. - . Alpha particles greatly deflected by the metal foil. c. Positive particles formed in the foil d. None of these 4) Find the number of protons, neutrons, and electrons in an atom of the following: (4pts) I did one for you!! QUIZ 91 NAME (Last, First): Chemistry 6A Fall 2008 UCSD PID: |A| I |_|_|_|_|___|_| Section A/E_ Your signature: Total Points: / 20 You have 10 minutes to Complete this quiz. Please show all your work, but write the answers in the designated spaces. The points allotted for each question are indicated in parenthesis. Potentially Helpful Constants: Potentially Helpful Equations: Mass of electron, m.: = 9.10938 x 10'31 kg Ex = l/vaz Mass of proton, 111,, = 1.67262 x 10'27 kg E _ qlq2 Mass of neutron, 111,. = 1.67493 x 10'27 kg P _ 47reor Fundamental charge, 6 = 1.60218 x 10" C E = mg,, g = 9.80665 m-s'2 c ;’ vx c = 2.99792 x 108 mos'1 Ex = bu _ (D h = 6.626 x 10'34 m E = h“ . . 7L= h/p Potentially Helpful Conversmn Factors: AXAP > 1 [21.1 1 J = l N-m — 1 N = 1 kg m s'2 1 L = 103 cm3 1eV = 1.6 x10''9 J T1 = h/21'1 1) If the work fimction, (I), of a metal is equal to 2.5eV and incoming light has a wavelength of 100nm, what is the speed of the ejected electron in units of _ m/s? , ___ .19 note. (1 eV 1.6x 10 J) (3pts.) Ct)“, . geoost nus ‘9 Y5 9‘ 2 —‘1 {1006/10 ,0 Velocity 2) How many electrons, if any, can have the following quantum numbers in an atom? Show your work and box answers. (2pts. each) a) n=3, 1=4 dogs nol? CHM" ‘£_O)‘t7_ b) n=5,l=3,m;=-l “1:5 , .4 , W . mi {— “Bf—2‘6); 0I I, z , 3 QmZ'f-‘l 3a) Draw representative shapes for each of the following orbitals on the x & y coordinate axes (lpt. each): ZS-orbital 2px-orbital 3dxy-orbital 9 \9 4%}— €}@_ X %x X “midi” Node(s): ‘l Node(s): I Node(s): ‘& + angular —— —— —— b) How many ‘total’ nodes are in each of the above orbitals? Indicate this below each drawing. (1 pt. each) c) What is a node? (lpt.) ?\QC€L Wm M )3 hp \Dmbuktbu'? O“F 6U\ €\ch:\~<‘bq . 4) Estimate the minimum uncertalnty in the position of a marble of mass 1.0g given that the speed is known to Within :t1.0 m/s (4pts). Am? «a “a AX(0,00| |¢j>(Qm/S> rah/QT QUIZ 3 NAME (Last, First): Chemistry 6A Fall 2008 UCSD PID: }A|_|_|_|_l_|_|__|_] Section A/E_ Your signature: Total Points: / 20 You have 10 minutes to complete this quiz. Please show all your work, but write the answers in the designated spaces. The points allotted for each question are indicated in parenthesis. Potentially Helpful Constants: Potentially Helpful Equations: Mass of electron, me = 9.10938 x 10'31 kg Ex = l/2mv2 Mass of proton, m1) = 1.67262 x 10'27 kg E _ qlq2 Mass of neutron, mu = 1.67493 x 10'27 kg P ‘ 47W Fundamental charge, 6 = 1.60218 x 10‘1 c E = mgh g = 9.80665 mos:2 c =” v)“ c = 2.99792 x 108 mos" E = h” _ (I, h = 6.626 x 10'34 m E“: h” . . X= h/p Potentlally Helpful Conversxon Factors: MI) > 1 [21.1 1 J = l N-m “ l N = 1 kg m 5'2 1 L = 103 cm3 1eV= 1.6x 10491 'E = 11/211 Lewis Structure # of Bond Pairs 2a) Write the chemical formula for the following compounds: (2pts) Sodium nitrate mot NO; Cobalt(III) oxide monohydrate CO 2 O; ' HZ—O 2b) Name each of the 'following compounds: (2pts) CaCzO4 Calcium oxalak— Ni(ClO4)2 m gel 2, (31:) (35¢,blom4c 3) Which molecule has the greatest coulombic attraction between individual ions (a single cation and anion)? Circle the molecule and explain your answer choice. (3 pts) K20 or or MgO ibVlz‘flr lAbfiWS¥ SWUJLS‘f Mela/L5 Explanation: Z l” r 4) Write the most likely charge(s) for the ions formed by each of the following elements: (4pts). Cs N ’$ In +3 or 4" ...
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This note was uploaded on 12/07/2009 for the course CHEM CHEM 6A taught by Professor Czarkowski during the Fall '07 term at UCSD.

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Quiz1-3 A04 - 7/ ‘0 ’hr 4.2 ~/ -1 Note: Don’t forget...

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