Periodic Table/Dubnium/²⁵⁶Db

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²⁵⁶Db

Dubnium-256

Radioactive· Half-life: 1.70 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

105

Neutrons (N)

151

Mass Number (A)

256

Atomic Mass

256.107674AMU

Spin / Parity

9-

Binding E/A

7.149keV

Natural Abundance

Trace / None

Half-life

1.70 s

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

α

70.0%

β⁺

30.0%

SF

Decay Chain

²⁵⁶DbDubnium1.70 s

α70.0%

β⁺²⁵⁶Rf30.0%

²⁵²LrLawrencium369 ms

α98.0%

β⁺²⁵²No

²⁴⁸MdMendelevium7.00 s

β⁺80.0%

α²⁴⁴Es20.0%

²⁴⁸FmFermium34.5 s

α100.0%

β⁺²⁴⁸Es

²⁴⁴CfCalifornium19.5 min

α75.0%

EC²⁴⁴Bk25.0%

²⁴⁰CmCurium30.4 d

α100.0%

EC²⁴⁰Am

²³⁶PuPlutonium2.86 y

α100.0%

28Mg²⁰⁸Pb2.00%

2β⁺²³⁶U

²³²UUranium68.9 y

α100.0%

24Ne²⁰⁸Pb8.90%

28Mg²⁰⁴Hg5.00%

²²⁸ThThorium1.91 y

α100.0%

20O²⁰⁸Pb1.13%

²²⁴RaRadium3.63 d

α100.0%

¹⁴C²¹⁰Pb4.00%

²²⁰RnRadon55.6 s

α100.0%

2β⁻²²⁰Ra

²¹⁶PoPolonium144 ms

α100.0%

2β⁻²¹⁶Rn

²¹²PbLead10.6 h

β⁻100.0%

²¹²BiBismuth1.01 h

β⁻64.1%

α²⁰⁸Tl35.9%

β⁻α²⁰⁸Pb0.01%

²¹²PoPolonium294 ns

α100.0%

²⁰⁸PbLeadSTABLE

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

Other Isotopes of Dubnium

255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270

← Back to DubniumData: IAEA NDS · ENSDF