Tungsten-182

Properties and data of the isotope ¹⁸²W.

Contents

See also: List of individual Tungsten isotopes (and general data sources).

General data

Name of the isotope:Tungsten-182; W-182Symbol:¹⁸²W or 18274WMass number A:182 (= number of nucleons)Atomic number Z:74 (= number of protons)Neutrons N:108Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4594594594595 (= neutron-proton ratio)Neutron excess (N-Z):34Isotopic mass:181.948204(6) u (atomic weight of Tungsten-182)Nuclide mass:181.9076131 u (calculated nuclear mass without electrons)Mass excess:-48.24766 MeVMass defect:1.566659296 u (per nucleus)Nuclear binding energy:1459.33373427 MeV (per nucleus)
8.01831722 MeV (average binding energy per nucleon)Separation energy:S_N = 8.0836(16) MeV (first neutron)
S_P = 7.0967(14) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.3559(17) femtometer fmYear of discovery:1930

Parent Nuclides

Direct parent isotopes are: ¹⁸²Re, ¹⁸²Ta, ¹⁸⁶Os.

Occurrence

Comparison of the natural Tungsten isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Tungsten Isotopic mixture	183.84 u	100 %
Isotope ¹⁸⁰W	179.94671(2) u	0.12(1) %	1.8(2) × 10¹⁸ a	0+
Isotope ¹⁸²W	181.948204(6) u	26.50(16) %	stable	0+
Isotope ¹⁸³W	182.950223(6) u	14.31(4) %	6.7 × 10²⁰ a	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 = 108) and isobaric (same nucleon number A = 182) with Tungsten-182. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 108	Isobar A = 182
66	¹⁷⁴Dy
67	¹⁷⁵Ho
68	¹⁷⁶Er
69	¹⁷⁷Tm
70	¹⁷⁸Yb	¹⁸²Yb
71	¹⁷⁹Lu	¹⁸²Lu
72	¹⁸⁰Hf	¹⁸²Hf
73	¹⁸¹Ta	¹⁸²Ta
74	¹⁸²W	¹⁸²W
75	¹⁸³Re	¹⁸²Re
76	¹⁸⁴Os	¹⁸²Os
77	¹⁸⁵Ir	¹⁸²Ir
78	¹⁸⁶Pt	¹⁸²Pt
79	¹⁸⁷Au	¹⁸²Au
80	¹⁸⁸Hg	¹⁸²Hg
81	¹⁸⁹Tl	¹⁸²Tl
82	¹⁹⁰Pb	¹⁸²Pb
83	¹⁹¹Bi
84	¹⁹²Po
85	¹⁹³At
86	¹⁹⁴Rn