Periodic Table/Protactinium/²²⁰Pa

← 219Pa221Pa →

²²⁰Pa

Protactinium-220

Radioactive· Half-life: 850 ns

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

91

Neutrons (N)

129

Mass Number (A)

220

Atomic Mass

220.021770AMU

Spin / Parity

1-

Binding E/A

7.444keV

Natural Abundance

Trace / None

Half-life

850 ns

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

α

100.0%

β⁺

Decay Chain

²²⁰PaProtactinium850 ns

α100.0%

β⁺²²⁰Th

²¹⁶AcActinium440 μs

α100.0%

β⁺²¹⁶Ra

²¹²FrFrancium20.0 min

β⁺57.0%

α²⁰⁸At43.0%

²¹²RnRadon23.9 min

α100.0%

²⁰⁸PoPolonium2.90 y

α100.0%

β⁺²⁰⁸Bi0.00%

²⁰⁴PbLeadSTABLE

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

Other Isotopes of Protactinium

211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241

← Back to ProtactiniumData: IAEA NDS · ENSDF