Isotopes of Argon (Ar)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
30Ar 30 30.02156(32)#
31Ar 31 31.01212(22)#
32Ar 32 31.9976380(19)
33Ar 33 32.9899257(5)
34Ar 34 33.9802712(4)
35Ar 35 34.9752576(8)
36Ar 36 35.967545106(29) 0.003365(30)
37Ar 37 36.96677632(22)
38Ar 38 37.9627324(4) 0.000632(5)
39Ar 39 38.964313(5)
40Ar 40 39.9623831225(29) 0.996003(30)
41Ar 41 40.9645006(4)
42Ar 42 41.963046(6)
43Ar 43 42.965636(6)
44Ar 44 43.9649240(17)
45Ar 45 44.9680400(6)
46Ar 46 45.968090(40)
47Ar 47 46.97219(11)
48Ar 48 47.97454(32)#
49Ar 49 48.98052(54)#
50Ar 50 49.98443(75)#
51Ar 51 50.99163(75)#
52Ar 52 51.99678(97)#
53Ar 53 53.00494(107)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Ar: 39.948(1)
Notes (Ar)

Isotopic Composition