Periodic Table/Protactinium/²¹⁷Pa

← 216Pa218Pa →

²¹⁷Pa

Protactinium-217

Radioactive· Half-life: 3.80 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

91

Neutrons (N)

126

Mass Number (A)

217

Atomic Mass

217.018309AMU

Spin / Parity

9/2-

Binding E/A

7.450keV

Natural Abundance

Trace / None

Half-life

3.80 ms

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

α

100.0%

β⁻

Decay Chain

²¹⁷PaProtactinium3.80 ms

α100.0%

β⁻²¹⁷U

²¹³AcActinium738 ms

α100.0%

β⁺²¹³Ra

²⁰⁹FrFrancium50.5 s

α89.0%

β⁺²⁰⁹Rn11.0%

²⁰⁵AtAstatine26.9 min

β⁺90.0%

α²⁰¹Bi10.0%

²⁰⁵PoPolonium1.74 h

β⁺100.0%

α²⁰¹Pb0.04%

²⁰⁵BiBismuth14.9 d

β⁺100.0%

²⁰⁵PbLead17.0 My

EC100.0%

²⁰⁵TlThalliumSTABLE

8-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