AtomicMassWSAK - t>e 2 SO rez4:59o6 tca4g(g'qu I a...

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ISOTOPES AND AVERAGE ATOMIC MASS Elements come in o voriety of isotopes, meoning they ore mode up of qtoms with the some otomic number but different otomic mosses, These otoms differ in the number of neutrons. The overoge otomic mqss is the weighted overoge of ollthe isotopes of on element' Exomple: A somplg of cesium is 757o t33Cs, 207o r32Cs ond 57o rsCs. Whqt is its overoge qlomic moss? Answer: .75 x 133 .20 x 132 .05 x 134 Totol = 99.75 = 26.4 - 6.7 = 132.85 omu = clverqge otomic moss Nome A^s*t, k</, 1. 80% 1271, 17o/o 1261, 3o/o 1281 ( e. to .ttrr) + (e,tz. t>c) + (g,a3.
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Unformatted text preview: t>e) 2, SO% rez4[:59o6 tca4g / \ (g'qu, I a z), (a,90, l6tt) 3, l5% 55Fe,85% $Fe (e, tS . ss) +(e,t9 , 9el 4. 99"/o rH,0,8% 2H,O'2"/"3H ( A,qq , /) + (e,eag ,s + (g,ea7t'3) 5. 95% raN, 3olo rsN, 2olo r6N (a,q5. t1) +(a, + ( a, a>' t(\ I L6, ?6 o"',u | \7 a,nv I q 7' 9ovnu lqy qhu 5 9. 8 sa''-u 5 e a.wru j. Oll qn,v Lan u l1,o? anu I ,l a"r*, t, | |,0'l a,.,v 12*car.^v Determine lhe overoge otomic moss of the followlng mixtures of isotopes. ,lS 6, 981" r2C,21" 14C ( e,qt . b) + (a,a)- , t"r) Chemistry 1F8766 olnstructlonol Fok. In(...
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