Periodic Table/Arsenic/⁸⁵As

← 84As86As →

⁸⁵As

Arsenic-85

Radioactive· Half-life: 2.02 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

33

Neutrons (N)

52

Mass Number (A)

85

Atomic Mass

84.932164AMU

Spin / Parity

5/2-

Binding E/A

8.313keV

Natural Abundance

Trace / None

Half-life

2.02 s

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁻

100.0%

β⁻n

62.6%

Decay Chain

⁸⁵AsArsenic2.02 s

β⁻100.0%

β⁻n⁸⁴Se62.6%

⁸⁵SeSelenium32.9 s

β⁻100.0%

⁸⁵BrBromine2.90 min

β⁻100.0%

⁸⁵KrKrypton10.7 y

β⁻100.0%

⁸⁵RbRubidiumSTABLE

5-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Arsenic

60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

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