Periodic Table/Iodine/131I
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131I

Iodine-131

Radioactive· Half-life: 8.02 d

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

53

Neutrons (N)

78

Mass Number (A)

131

Atomic Mass

130.906126AMU

Spin / Parity

7/2+

Binding E/A

8.216keV

Natural Abundance

Trace / None

Half-life

8.02 d

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

β⁻
100.0%

Decay Chain

131IIodine8.02 d
β⁻100.0%
131XeXenonSTABLE

2-step decay chain → stable · Primary path shown

Other Isotopes of Iodine

106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147

Medical Applications

TherapeuticI-131

Thyroid cancer treatment and hyperthyroidism therapy

View all radiopharmaceuticals →
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