Periodic Table/Lawrencium/²⁵⁵Lr

← 254Lr256Lr →

²⁵⁵Lr

Lawrencium-255

Radioactive· Half-life: 31.1 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

103

Neutrons (N)

152

Mass Number (A)

255

Atomic Mass

255.096562AMU

Spin / Parity

1/2-

Binding E/A

7.196keV

Natural Abundance

Trace / None

Half-life

31.1 s

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

α

99.7%

β⁺

0.3%

SF

Decay Chain

²⁵⁵LrLawrencium31.1 s

α99.7%

β⁺²⁵⁵No0.30%

²⁵¹MdMendelevium4.21 min

α10.0%

β⁺²⁵¹Fm

²⁴⁷EsEinsteinium4.55 min

β⁺93.0%

α²⁴³Bk7.00%

²⁴⁷CfCalifornium3.11 h

EC100.0%

α²⁴³Cm0.04%

²⁴⁷BkBerkelium1.38 ky

α100.0%

²⁴³AmAmericium7.35 ky

α100.0%

²³⁹NpNeptunium2.36 d

β⁻100.0%

α²³⁵Pa

²³⁹PuPlutonium24.1 ky

α100.0%

²³⁵UUranium704 My

α100.0%

20Ne²¹⁵Pb8.00%

25Ne²¹⁰Pb8.00%

28Mg²⁰⁷Hg8.00%

²³¹ThThorium1.06 d

β⁻100.0%

²³¹PaProtactinium32.6 ky

α100.0%

24Ne²⁰⁷Tl13.4%

23F²⁰⁸Pb9.90%

²²⁷AcActinium21.8 y

β⁻98.6%

α²²³Fr1.38%

²²⁷ThThorium18.7 d

α100.0%

²²³RaRadium11.4 d

α100.0%

¹⁴C²⁰⁹Pb8.90%

²¹⁹RnRadon3.96 s

α100.0%

²¹⁵PoPolonium1.78 ms

α100.0%

β⁻²¹⁵At2.30%

²¹¹PbLead36.2 min

β⁻100.0%

²¹¹BiBismuth2.14 min

α100.0%

β⁻²¹¹Po0.28%

²⁰⁷TlThallium4.77 min

β⁻100.0%

²⁰⁷PbLeadSTABLE

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

Other Isotopes of Lawrencium

251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266

← Back to LawrenciumData: IAEA NDS · ENSDF