Exam 4 p4 - page 4 16(23 The only stable isotope of...

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Unformatted text preview: page 4 16. (23 The only stable isotope of fluorine is fluorine-19. Predict possible modes of decay for F—Zl “.73“ madman: “Elfin rah}; e5 \3 amissiom in lower Ho‘s I'A‘Ho F—IS Too ““3 Prdl‘ons or 4-90 frat; “@de $Elep‘ifian a {-ure or yogi-row emission fife. P0557556 46 (MtgcmmimS-(Alpiu-L ent‘sn‘os‘ unlikely (or {F t mulch? 17. (3‘1 Iodine-131 is used in the diag%osis and treatment of thyroid disease and has a lf-life o 8.1 days. If a patient with thyroid disease consumes a sample of Na13 1I containing 1><10‘5 g of I-131, how long will it take for the amount ofI-131 to decrease to 1/100 of the original amount? - git 92 = L" l N : Nu e t - 43d: Vt \ x‘ovs __._ io'b Xe. , IE) ‘3 3 €A(0.0t:'&t :flgffit 0,01 - : {at £31, 8.1da35 [7103,0132 - at f; *H.é (31%;) 2 5.4 ‘14:.) a; 5-0 4435 .. o. . “ 18. (a) (ll Uranium-235 is fissionable and is used in nuclear reactors. Balance the following (I “5' F’ 3“ reaction. 1‘ t . 91 A 5 -t 1,6 ‘ n + 235U -) l‘HBa + Kr + 5 ‘f\ must QM up 0 ‘11 q, 30 _o (b) ( I) What are the conditions for making this reaction self—sustaining? ($114:ch ‘qus («faked so Had one neuirou (mom each (isston Newt cause; mower Qissr‘on event (lasted 0?- (imaging)- 19. (1‘) Bombardment of Nitrogen-14 with high-energy neutrons fi‘om space produces Carbon-14. Write a balanced equation for this process. (Atomic NM. 7 And é 3 H I, . WC IH 7N + o“ —-> b +( 20. (if) Calculate the energy released per He-4 nucleus produced in the following reaction. Z‘H + 3H —)qu + 0‘n I L 0 Atomic masses are: H-2 2 2.01410 amu , H—3 = 3.01605 amu, He-4=4.00260 e1ectron= 5.4858E-4 amu , neutron= 1.00866 amu was»? ._ - Am 7-" UHe Lucien} f l e') + ”e“+r°“] -— [( H—Z nu‘leus + if) 4" (ll-3 Mcled$ + '6. )1 W W W atomic MM) atomic M6155 atom}. ““55 E ladle-om wages maul (26 — le.’ J?) 50 me are suSHFe-d "Vt “Sing, Eduwic. M5865 +0 c‘riccdal‘e MQGHQ‘M'Q 1‘“ Auclaqf Mai-59$- Aim ' (LLDCZéo + lmeBéQ— (Lowe + 2.0%05‘) 5'- '- (.88? “0 “m” ' .3 _ s 2. .47... 4,88%;sz Waxgsom c2.) :—2.87_xm a \Amu bE‘. AmC—z : '1. (Ne 2&0”. X1013 ) iI:iM~m-— &%%> ...
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