Periodic Table/Americium/²²⁵Am

← 224Am226Am →

²²⁵Am

Americium-225

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

95

Neutrons (N)

130

Mass Number (A)

225

Atomic Mass

225.045508AMU

Spin / Parity

9/2-

Binding E/A

7.337keV

Natural Abundance

Trace / None

Half-life

Unknown

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

α

SF

Decay Chain

²²⁵AmAmericium?

α

²²¹NpNeptunium?

α

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

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

Other Isotopes of Americium

223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249

← Back to AmericiumData: IAEA NDS · ENSDF