See also: List of individual Bismuth isotopes (and general data sources).
General data
Name of the isotope:Bismuth-210; Bi-210Other names:Radium ESymbol:210Bi or 21083BiMass number A:210 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:127Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.5301204819277 (= neutron-proton ratio)Neutron excess (N-Z):44Isotopic mass:209.9841202(15) u (atomic weight of Bismuth-210)Nuclide mass:209.9385933 u (calculated nuclear mass without electrons)Mass excess:-14.79194 MeVMass defect:1.765801788 u (per nucleus)Nuclear binding energy:1644.83377071 MeV (per nucleus) 7.83254177 MeV (average binding energy per nucleon)Separation energy:SN = 4.60463(8) MeV (first neutron) SP = 4.4663(11) MeV (first proton)Half-life:5.012(5) dDecay constant λ:1.600665764572 × 10-6 s-1Specific activity α:4.590554054652 × 10+15 Bq g-1 124069.02850412 Ci g-1Spin and parity: (nuclear angular momentum)1-Magnetic dipole moment:μ(μN) = - 0.04451(6)Quadrupole moment Q:0.13.6(1) barn (100 fm2)Nuclear g-factor:gl = -0.04451Charge radius:5.5300(903) femtometer fmYear of discovery:1905
Radioactive Decay
Half-life T½ = 5.012(5) d respectively 4.330368 × 105 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 127) and isobaric (same nucleon number A = 210) with Bismuth-210. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
