Isotopes of Arsenic (As)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
60As 60 59.99313(64)#
61As 61 60.98062(64)#
62As 62 61.97320(32)#
63As 63 62.96369(54)#
64As 64 63.95757(38)#
65As 65 64.94956(32)#
66As 66 65.94471(73)
67As 67 66.93919(11)
68As 68 67.936770(50)
69As 69 68.932270(30)
70As 70 69.930920(50)
71As 71 70.927112(5)
72As 72 71.926752(5)
73As 73 72.923825(4)
74As 74 73.9239287(25)
75As 75 74.9215965(20) 1.0000
76As 76 75.9223940(20)
77As 77 76.9206473(25)
78As 78 77.921827(11)
79As 79 78.920948(6)
80As 80 79.922534(25)
81As 81 80.922132(6)
82As 82 81.92450(21)
83As 83 82.92498(24)
84As 84 83.92906(32)#
85As 85 84.93202(21)#
86As 86 85.93650(32)#
87As 87 86.93990(32)#
88As 88 87.94494(54)#
89As 89 88.94939(54)#
90As 90 89.95550(86)#
91As 91 90.96043(97)#
92As 92 91.96680(97)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
As: 74.921595(6)

Isotopic Composition