Periodic Table/Selenium/⁸¹Se

← 80Se82Se →

⁸¹Se

Selenium-81

Radioactive· Half-life: 18.4 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

34

Neutrons (N)

47

Mass Number (A)

81

Atomic Mass

80.917993AMU

Spin / Parity

1/2-

Binding E/A

8.472keV

Natural Abundance

Trace / None

Half-life

18.4 min

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

β⁻

100.0%

Decay Chain

⁸¹SeSelenium18.4 min

β⁻100.0%

⁸¹BrBromineSTABLE

2-step decay chain → stable · Primary path shown

Other Isotopes of Selenium

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 93 94 95

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