Periodic Table/Arsenic/⁸⁷As

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⁸⁷As

Arsenic-87

Radioactive· Half-life: 492 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

33

Neutrons (N)

54

Mass Number (A)

87

Atomic Mass

86.940292AMU

Spin / Parity

5/2-

Binding E/A

8.220keV

Natural Abundance

Trace / None

Half-life

492 ms

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

β⁻

100.0%

β⁻n

15.4%

2n

Decay Chain

⁸⁷AsArsenic492 ms

β⁻100.0%

β⁻n⁸⁶Se15.4%

2n⁸⁵As

⁸⁷SeSelenium5.50 s

β⁻100.0%

β⁻n⁸⁶Br0.60%

⁸⁷BrBromine55.7 s

β⁻100.0%

β⁻n⁸⁶Kr2.60%

⁸⁷KrKrypton1.27 h

β⁻100.0%

⁸⁷RbRubidium49.7 Gy

β⁻100.0%

⁸⁷SrStrontiumSTABLE

6-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

← Back to ArsenicData: IAEA NDS · ENSDF