Periodic Table/Fermium/²⁴⁶Fm

← 245Fm247Fm →

²⁴⁶Fm

Fermium-246

Radioactive· Half-life: 1.54 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

100

Neutrons (N)

146

Mass Number (A)

246

Atomic Mass

246.075353AMU

Spin / Parity

0+

Binding E/A

7.260keV

Natural Abundance

Trace / None

Half-life

1.54 s

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

α

93.2%

SF

6.8%

EC

1.3%

Decay Chain

²⁴⁶FmFermium1.54 s

α93.2%

EC²⁴⁶Es1.30%

²⁴²CfCalifornium3.49 min

α61.0%

β⁺²⁴²Bk39.0%

²³⁸CmCurium2.20 h

α3.84%

EC²³⁸Am

²³⁴PuPlutonium8.80 h

EC94.0%

α²³⁰U6.00%

²³⁴NpNeptunium4.40 d

β⁺100.0%

²³⁴UUranium246 ky

α100.0%

26Ne²⁰⁸Pb9.00%

28Mg²⁰⁶Hg1.40%

²³⁰ThThorium75.4 ky

α100.0%

24Ne²⁰⁶Hg5.80%

²²⁶RaRadium1.60 ky

α100.0%

¹⁴C²¹²Pb2.60%

2β⁻²²⁶Th

²²²RnRadon3.82 d

α100.0%

²¹⁸PoPolonium3.10 min

α100.0%

β⁻²¹⁸At0.02%

²¹⁴PbLead27.1 min

β⁻100.0%

²¹⁴BiBismuth19.9 min

β⁻100.0%

α²¹⁰Tl0.02%

β⁻α²¹⁰Pb0.00%

²¹⁴PoPolonium163 μs

α100.0%

²¹⁰PbLead22.2 y

β⁻100.0%

α²⁰⁶Hg1.90%

²¹⁰BiBismuth5.01 d

β⁻100.0%

α²⁰⁶Tl13.2%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

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

Other Isotopes of Fermium

241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260

← Back to FermiumData: IAEA NDS · ENSDF