Periodic Table/Iodine/¹⁰⁹I

← 108I110I →

¹⁰⁹I

Iodine-109

Radioactive· Half-life: 92.8 μs

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

53

Neutrons (N)

56

Mass Number (A)

109

Atomic Mass

108.938086AMU

Spin / Parity

1/2+

Binding E/A

7.972keV

Natural Abundance

Trace / None

Half-life

92.8 μs

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

p

100.0%

α

0.0%

Decay Chain

¹⁰⁹IIodine92.8 μs

p100.0%

α¹⁰⁵Sb0.01%

¹⁰⁸TeTellurium2.10 s

β⁺51.0%

α¹⁰⁴Sn49.0%

β⁺p¹⁰⁷Sn2.40%

β⁺α¹⁰⁴In0.07%

¹⁰⁸SbAntimony7.40 s

β⁺100.0%

¹⁰⁸SnTin10.3 min

β⁺100.0%

¹⁰⁸InIndium58.0 min

β⁺100.0%

¹⁰⁸CdCadmiumSTABLE

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

Other Isotopes of Iodine

106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147

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