Bismuth-209
Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay). It has 83 protons and a magic number of 126 neutrons, and an atomic mass of 208.9803987 amu (atomic mass units). Primordial bismuth consists entirely of this isotope.
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ActiniumActinium-225Alpha decayAstatineAtomic nucleusBi-2091,2-dimethoxyethaanBohriumChemical elementCurie (unit)Decay chainEmilio SegrèFebruary 1981Fission barrierFleroviumGroup 7 elementIsland of stabilityIsotopes of astatineIsotopes of bismuthIsotopes of goldIsotopes of hassiumIsotopes of leadLead-bismuth eutecticLiquid–liquid extractionList of alpha emitting materialsList of elements by stability of isotopesList of nuclidesList of radioactive nuclides by half-lifeLivermoriumMeitneriumMononuclidic elementMoscoviumNonmetalOperation SandstoneOrders of magnitude (time)Period 6 elementPoloniumPolonium-210Properties of metals, metalloids and nonmetalsRadionuclide
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Bismuth-209
Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay). It has 83 protons and a magic number of 126 neutrons, and an atomic mass of 208.9803987 amu (atomic mass units). Primordial bismuth consists entirely of this isotope.
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Bismuth-209 (209Bi) is the iso ...... ists entirely of this isotope.
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1,012,738,792
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abundance
after
before
binding energy
7.847987e+3
decay energy
decay mass
decay mode
decay product
thallium-205
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decay symbol
Tl
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element
bismuth
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excess energy
−18 258.461
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halflife
6.3430776E7
heavier
bismuth-210
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lighter
bismuth-208
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mass
2.089803987e+2
mass number
num neutrons
num protons
parent
astatine-213
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lead-209
@en
polonium-209
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parent2 decay
b+
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parent2 mass
parent2 symbol
Po
@en
parent3 decay
a
@en
parent3 mass
parent3 symbol
At
@en
parent decay
b
@en
parent mass
parent symbol
Pb
@en
symbol
Bi
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wikiPageUsesTemplate
subject
type
comment
Bismuth-209 (209Bi) is the iso ...... ists entirely of this isotope.
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label
Bismuth-209
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