656 



TABLE 717.— TABLE OF IS0T0PE8 (continued) 



Naturally 



radioactive 



isotopes 



(number) 



Nd 1 



Sm 1 



Artificially 



radioactive 



isotopes 



(number) 



19 

 6 



Lu 1 



(continued) 



10 

 6 



12 



13 

 17 



17 

 18 



16 

 13 



15 

 12 



10 



Relative abundance of 

 natural isotopes 



Mq 92 .94 .96 .90 .97 .98 .100 _ JJ gg . 



9.12: 15.7: 16.5: 9.45: 23.75: 

 9.62 



TJ. .96 .98 .99 .100 .101 .102 .104 C £Q . 



2.22:' 12.81:' 12.70 ~ 16^98 :' 

 31.34: 18.27 

 Rh 103 = 100.00 



p J102 .104 .105 .106 .108 .110 O . Q ~1 . 



22.6 : 27.2 : 26.8 : 13^5 ' 

 Ag io7. A g 10e = 51.35: 48.65 



/-J 106 . 108 . 110 . Ill . 112 . 118 . 114 . 116 



1.215 : .875:' 12.39: 12.751 

 24.07: 12.26: 28.86: 7.58 

 In 113 : In 115 = 4.23 : 95.77 



C-,112 .114 .115 .116 .117 .118 .119 .120 .122 .124 



= .90 ': .61:' .35: 14.07 :' 7.54 : 

 23.98: 8.62: 33.03: 4.78: 6.11 

 Sb m : Sb 123 = 57.25 : 42.75 



T- 120 . 122 . 123 . 124 . 125 . 126 . 128 . 130 



.091: 2.49: .89:' 4.63: ' 7.0U 

 18.72: 31.72: 34.46 

 I m = 100.00 



Vp.124 .126 .128 .129 .180 .131 .132 .134 .186 



.094: .088: 1.90: 26.23 :'4.o7: 

 21.17: 26.96: 10.54: 8.95 

 Cs 183 = 100.00 



IJjjlSO .182 .184 .135 .136 .187 .138 101" 



.097: 2.42: 6.59: 7.8l7 11.32: 



71.66 

 La 138 : La 130 = .089: 99.911 



Ce 136 .138 .140 .142 _ JQ3. 250: 



88.48: 11.07 

 Pr 141 = 100.00 



la J142 .143 .144 .145 .146 .148 .150 27 1 3 - 



12.20: 23.87 :'8.30: 17.18: 5.72': 

 5.60 



C_^144 .147 .148 .140 .150 .152 .154 •? 1 C . 



15.07: ' 11.27: ' 13.84 T 7^47 : 

 26.63: 22.53 

 Eu m : Eu 153 = 47.77 : 52.23 



/-J162 .154 .155 .168 .167 .158 .180 Of)' 



2.15: ' 14.78: 20.59: ~~1571 : 

 24 78: 21.79 

 Tb 159 = 100.00 



■r) v 158 .158 .160 .161 .162 .163 .164 0524 ' 



.0902:' 2.294: 'lS^T 25.53 i 

 24.97: 28.18 

 Ho lflB = 100.00 



P_162 .164 .166 .167 .168 .170 1 . 1 C . 



32.9 : 24.4 : 26.9 : R2 ' 

 Tm 198 = 100.00 



■yV.168 .170 .171 .172 .173 .174 .178 QiC . 



4.21 : ' 14.26: '21.49: _ 1 7.02! 

 29.58: 13.38 

 Lu 175 : Lu 17a = 97.5 : 2.5 



TTfl74 .176 .177 .178 .179 .180 lO. C -)(\ . 



18.47:' 27.10': 13.841 35.11 



Ta ,81 = 100.00 



SMITHSONIAN PHYSICAL TABLES 



