Mercury-190

Properties and data of the isotope ¹⁹⁰Hg.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Mercury-190; Hg-190Symbol:¹⁹⁰Hg or 19080HgMass number A:190 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:110Isotopic mass:189.966322(17) u (atomic weight of Mercury-190)Nuclide mass:189.9224404 u (calculated nuclear mass without electrons)Mass excess:-31.37085 MeVMass defect:1.61282132 u (per nucleus)Nuclear binding energy:1502.33338265 MeV (per nucleus)
7.9070178 MeV (average binding energy per nucleon)Separation energy:S_N = 9.82(4) MeV (first neutron)
S_P = 5.078(26) MeV (first proton)Half-life:20.0(5) minDecay constant λ:0.00057762265046662 s^-1Specific activity α:1.840489399470 × 10⁺¹⁸ Bq g^-1
49742956.742457 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.4158(37) femtometer fmYear of discovery:1959

Radioactive Decay

Half-life T_½ = 20.0(5) min (minutes) respectively 1.200 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁸⁶Pt	trace	4.069(27) MeV
EC/β⁺	¹⁹⁰Au	> 99.9999 %	1.463(16) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁹⁴Pb, ¹⁹⁰Tl.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 190) with Mercury-190. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 110	Isobar A = 190
69	¹⁷⁹Tm
70	¹⁸⁰Yb
71	¹⁸¹Lu
72	¹⁸²Hf	¹⁹⁰Hf
73	¹⁸³Ta	¹⁹⁰Ta
74	¹⁸⁴W	¹⁹⁰W
75	¹⁸⁵Re	¹⁹⁰Re
76	¹⁸⁶Os	¹⁹⁰Os
77	¹⁸⁷Ir	¹⁹⁰Ir
78	¹⁸⁸Pt	¹⁹⁰Pt
79	¹⁸⁹Au	¹⁹⁰Au
80	¹⁹⁰Hg	¹⁹⁰Hg
81	¹⁹¹Tl	¹⁹⁰Tl
82	¹⁹²Pb	¹⁹⁰Pb
83	¹⁹³Bi	¹⁹⁰Bi
84	¹⁹⁴Po	¹⁹⁰Po
85	¹⁹⁵At	¹⁹⁰At
86	¹⁹⁶Rn