Periodic Table/Neptunium/²²⁵Np

← 224Np226Np →

²²⁵Np

Neptunium-225

Radioactive· Half-life: 6.50 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

93

Neutrons (N)

132

Mass Number (A)

225

Atomic Mass

225.033943AMU

Spin / Parity

9/2-

Binding E/A

7.396keV

Natural Abundance

Trace / None

Half-life

6.50 ms

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

α

100.0%

β⁺

Decay Chain

²²⁵NpNeptunium6.50 ms

α100.0%

β⁺²²⁵U

²²¹PaProtactinium5.90 μs

α100.0%

²¹⁷AcActinium69.0 ns

α100.0%

β⁺²¹⁷Ra

²¹³FrFrancium34.1 s

α99.4%

β⁺²¹³Rn0.56%

²⁰⁹AtAstatine5.42 h

β⁺96.1%

α²⁰⁵Bi3.90%

²⁰⁹PoPolonium124 y

α99.5%

β⁺²⁰⁹Bi0.45%

²⁰⁵PbLead17.0 My

EC100.0%

²⁰⁵TlThalliumSTABLE

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

Other Isotopes of Neptunium

219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245

← Back to NeptuniumData: IAEA NDS · ENSDF