Periodic Table/Nobelium/²⁵⁶No

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²⁵⁶No

Nobelium-256

Radioactive· Half-life: 2.91 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

102

Neutrons (N)

154

Mass Number (A)

256

Atomic Mass

256.094282AMU

Spin / Parity

0+

Binding E/A

7.213keV

Natural Abundance

Trace / None

Half-life

2.91 s

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

α

99.5%

SF

0.6%

EC

Decay Chain

²⁵⁶NoNobelium2.91 s

α99.5%

EC²⁵⁶Md

²⁵²FmFermium1.06 d

α100.0%

2β⁺²⁵²Cf

²⁴⁸CfCalifornium334 d

α100.0%

²⁴⁴CmCurium18.1 y

α100.0%

²⁴⁰PuPlutonium6.56 ky

α100.0%

34Si²⁰⁶Hg1.30%

²³⁶UUranium23.4 My

α100.0%

²³²ThThorium14.0 Gy

α100.0%

26Ne²⁰⁶Hg2.78%

2β⁻²³²U

²²⁸RaRadium5.75 y

β⁻100.0%

²²⁸AcActinium6.15 h

β⁻100.0%

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

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

Other Isotopes of Nobelium

248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264

← Back to NobeliumData: IAEA NDS · ENSDF