TABLE 717.— TABLE OF ISOTOPES* 



655 



Artificially 



radioactive 



isotopes 



(number) 



1 



1 

 1 



3 

 1 

 3 

 3 

 3 



3 

 2 



4 

 2 



4 

 2 



4 

 3 



5 

 4 



6 

 4 



* For reference, see footnote 

 t Numbers following symbol 



5 



8 

 7 



8 

 9 



8 

 10 



12 

 16 



14 

 10 



10 



7 



14 



199, p. 618. 



indicate names of isotopes of that element. 



(continued) 



Relative abundance of 

 natural isotopes 



H J t : H 2 = 99.9844: .0156 



He 8 : He* = 1.3XlO- 4 : 99.9999 



Li 9 : Li 7 = 7.39: 92.61 



Be 9 = 100.00 



B 10 : B u = 18.83: 81.17 



C 12 : C 18 = 98.9: 1.1 



N 14 :N 15 = 99.62: .38 



O". i7. i8 _ 99757. 039: 



.204 

 F 19 = 100.00 

 Ne 20 : Ne 21 : Ne 22 = 90.51 : .28 : 



9.21 

 Na 23 = 100.00 

 Mg 24 : Mg 25 : Mg 20 = 78.60: 



10.11: 11.29 

 Al 27 = 100.00 

 Si 28 : Si 20 : Si 30 = 92.28: 4.67: 



3.05 

 P 31 = 100.00 

 S" 2 : S 13 : S 34 : S 30 = 95.06 : .74 : 



4.18: .016 

 CI 35 : CI 37 = 75.4 : 24.6 

 A 39 : A E8 : A 40 = .307: .060: 



99.633 

 K 39 : K 40 : K 41 = 93.3: .011: 6.7 

 Ca 40 : Ca 42 : Ca 43 : Ca 44 : Ca 40 : 



Ca 48 = 96.96: .64: .15: 2 06: 



.0033: .19 

 Sc 45 = 100.00 

 Ti 40 : Ti 47 : Ti 48 : Ti 49 : Ti 60 = 



7.95: 7.75: 73.45: 5.51: 5.34 

 V B1 = 100.00 

 Cr 50 : Cr 52 : Cr 53 : Cr 54 = 4.49: 



83.78 : 9.43 : 2.30 

 Mn 55 = 100.00 

 Fe 54 : Fe 56 : Fe 57 : Fe 68 = 5.81: 



91.64: 2.21: .34 

 Co 59 = 100.00 

 Ni 58 : Ni 00 : Ni 91 : Ni 92 : Ni 84 = 



67.76: 26.16: 1.25: 3.66: 1.16 

 Cu 93 : Cu 95 = 69.09 : 30.91 

 Zn 94 : Zn 99 : Zn 97 : Zn 98 : Zn 70 = 



48.89 : 27.81 : 4.07 : 18.61 : .620 

 Ga" : Ga 71 = 60.2 : 39.8 

 Ge 70 : Ge 72 : Ge 73 : Ge 74 : Ge 79 = 



20.55 : 27.37 : 7.61 : 36.74 : 7.67 

 As 75 = 100.00 



g e 74 .TO .77 .78 .80 .82 __ g7 . 9 Q2 • 



7.58': 23.52': 49.82: 9.19 

 Br 79 : Br 81 = 50.5: 49.5 



Kr 78 .80 .82 .83 .84 .86 _ 343. 2.223: 



11.50: il.48: 57.02: 17.43 

 Rb 85 : Rb S7 = 72.8 : 27.2 



g r 84 .80 .87 .88 _ 55. 9 gg . J Q2 . 



82.56 



Y 89 = 100.00 



ZrM .91 .92 m . M _ 5146 . 112 3; 



17.11: 17.40: 2.80 

 Nb 93 = 100.00 



SMITHSONIAN PHYSICAL TABLES 



