fall2002quiz1 - ENSC 3313 Fall 20d Quiz 1 Name wow-tea...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ENSC 3313, Fall 20d: Quiz 1 Name wow-tea ELECTHDHIG Tamarns anon on someones an-ue woes rs F'FIUHrttiTE [1' Answer any 4 gnestions onltr.I 1 point each I. At the Jtritish Nuclear i-‘uels [EFF] reprocessing center, they intend to discharge 51d terabecqueiels of radioactive Mime the North Sea over a 5-year period. 'I he haIF—life of Te is 2. I it s “tip so twmspruuun deem fags in 5G0}? (New Scientist. March 24, 20d], p. 1?}. If EF'E- ’ 11' :'-:'Ia'- ‘ our t~ an i" . . . . “\‘l' I “EL-1w...tf.‘.fffifi9dfif§fi{ffififfijflflhfli w1tht1rne. L 11. s. 5 n {-t-_.-: L I. a“. LIZ; fl... _ I- . 1 a. i. W .. i. 'r'hr'ifi'f—ZeJW‘ 0.5 = e 1'1” m units ot‘ltl5 s = 3.13? 1-! ‘1 {ii i era's ' P,” . . _ .UU5E3.U? _ Repeating A — c - w Hence, proportion decayed = one; 2. What have I marked out from this diagram that I showed on the overhead projector? Comment appropriately. unfli— An engineer should always look ahead to the pflSSlblllly of failure mum,“ and its consequences. The Space Shuttle, Challenger. was destroyed . because a rubber seal tailed. The component had been specified 'I'B-UJ'ER'I'IEE Withfllll adequate consideration of its properties and without "rial-mum appropriate testing with reference to temperature and repetitive Wilma” temperature cpehng. PHUI'EHHEE CAN BE FH‘I'MCAI .. HECIIANIEhL. flchL LET! CHEMILIAI. 3. The energy gap between the 2s and 3s orbitals of H is 1.89 eh“. What wavelength of light would be required to promote an electron across this gap? h = 6.453 x 10'“ Face. e = Tit} x It!” nnu’see. 1 eV -— 1.5 x is“ J. ' ‘1‘} vzhv3E= 139$" thy-cit] J h oofixld'“ J—see K rev =4.ss x to“ Sec—l 11' it =3 =———3‘Dxlfl “mimic = dittle: nm assent” see—1 This would be visible as Orange~Red light. l shoWed this diagram on the overhead projector. Why? ( - tell 2 features pertaining to bonding that this tiguie i Hush-ates.) METI-Lah’l'. 4 equivalent honds give a tetrahedron. "‘ Medians is a gas heeanse it is a small molecule with no significant secondary bonds. * The molecule is synnnetrieal- no dipole. There are 3 equivalent nearest neighbors. This is the coordination number. Let R he the radius of the larger ion. Like ions must not touch the stability. At instabilityj R + R " a But, along cuhe diagonal Hi I 21‘ :- {13a Equatinf, by eliminating ‘a’ it"lS—i it —1' i— = UTE? H. Ilse the element magnesium [atomic number 12} aner oxygen (atomic number 3} to illustrate the primary bond types hettveen atoms. Ionic honding could arise in the compound MgO, where Mg donates its complete the 2p shell of D. The bond would arise from attraction. tivo 3s2 electrons to G to the positive negative L‘oulomhic Covalent bonding 1would arise in the molecule 03, where two eleetron pair heads are shared to complete the oxygen shells of the two atoms involved Metallic bonding arises in magnesium for the N = 3 shell cannot he filled by localized electrons; the its electrons are common to the stiueture. the “at home" electrons are in a filled N = 2 shell. ...
View Full Document

This note was uploaded on 01/10/2012 for the course ENSC 3313 taught by Professor Staff during the Fall '11 term at Oklahoma State.

Page1 / 2

fall2002quiz1 - ENSC 3313 Fall 20d Quiz 1 Name wow-tea...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online