See also: List of individual Tungsten isotopes (and general data sources).
General data
Name of the isotope:Tungsten-184; W-184Symbol:184W or 18474WMass number A:184 (= number of nucleons)Atomic number Z:74 (= number of protons)Neutrons N:110Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4864864864865 (= neutron-proton ratio)Neutron excess (N-Z):36Isotopic mass:183.950931(6) u (atomic weight of Tungsten-184)Nuclide mass:183.9103401 u (calculated nuclear mass without electrons)Mass excess:-45.70748 MeVMass defect:1.581262128 u (per nucleus)Nuclear binding energy:1472.93618466 MeV (per nucleus) 8.00508796 MeV (average binding energy per nucleon)Separation energy:SN = 7.41111(13) MeV (first neutron) SP = 7.7009(15) MeV (first proton)Half-life:stableSpin and parity: (nuclear angular momentum)0+Charge radius:5.3658(23) femtometer fmYear of discovery:1930
Comparison of the natural Tungsten isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
Quantity
Half-life
Spin
Tungsten Isotopic mixture
183.84 u
100 %
Isotope 180W
179.94671(2) u
0.12(1) %
1.8(2) × 1018 years
0+
Isotope 182W
181.948204(6) u
26.50(16) %
stable
0+
Isotope 183W
182.950223(6) u
14.31(4) %
6.7 × 1020 years
1/2-
Isotope 184W
183.950931(6) u
30.64(2) %
stable
0+
Isotope 186W
185.95436(2) u
28.43(19) %
stable
0+
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 184) with Tungsten-184. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
