Periodic Table/Protactinium/²²²Pa

← 221Pa223Pa →

²²²Pa

Protactinium-222

Radioactive· Half-life: 3.80 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

91

Neutrons (N)

131

Mass Number (A)

222

Atomic Mass

222.023687AMU

Spin / Parity

1-

Binding E/A

7.442keV

Natural Abundance

Trace / None

Half-life

3.80 ms

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

α

100.0%

Decay Chain

²²²PaProtactinium3.80 ms

α100.0%

²¹⁸AcActinium1.00 μs

α100.0%

²¹⁴FrFrancium5.51 ms

α100.0%

²¹⁰AtAstatine8.10 h

β⁺99.8%

α²⁰⁶Bi0.17%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

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