Periodic Table/Einsteinium/²³⁹Es

240Es →

²³⁹Es

Einsteinium-239

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

99

Neutrons (N)

140

Mass Number (A)

239

Atomic Mass

239.068310AMU

Spin / Parity

3/2-

Binding E/A

7.269keV

Natural Abundance

Trace / None

Half-life

Unknown

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

α

β⁺

SF

Decay Chain

²³⁹EsEinsteinium?

α

β⁺²³⁹Cf

²³⁵BkBerkelium?

β⁺

α²³¹Am

²³⁵CmCurium7.00 min

α4.00%

β⁺²³⁵Am

²³¹PuPlutonium8.60 min

α13.0%

β⁺²³¹Np

²²⁷UUranium1.10 min

α100.0%

β⁺²²⁷Pa

²²³ThThorium600 ms

α100.0%

²¹⁹RaRadium9.00 ms

α100.0%

²¹⁵RnRadon2.30 μs

α100.0%

²¹¹PoPolonium516 ms

α100.0%

²⁰⁷PbLeadSTABLE

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

Other Isotopes of Einsteinium

239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258

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