Periodic Table/Protactinium/²²⁶Pa

← 225Pa227Pa →

²²⁶Pa

Protactinium-226

Radioactive· Half-life: 1.80 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

91

Neutrons (N)

135

Mass Number (A)

226

Atomic Mass

226.027948AMU

Spin / Parity

1-

Binding E/A

7.435keV

Natural Abundance

Trace / None

Half-life

1.80 min

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

α

74.0%

β⁺

26.0%

Decay Chain

²²⁶PaProtactinium1.80 min

α74.0%

β⁺²²⁶Th26.0%

²²²AcActinium5.00 s

α99.0%

β⁺²²²Ra1.00%

²¹⁸FrFrancium1.40 ms

α100.0%

²¹⁴AtAstatine558 ns

α100.0%

²¹⁰BiBismuth5.01 d

β⁻100.0%

α²⁰⁶Tl13.2%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

7-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