Mercury-192

Properties and data of the isotope ¹⁹²Hg.

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-192; Hg-192Symbol:¹⁹²Hg or 19280HgMass number A:192 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:112Isotopic mass:191.965634(17) u (atomic weight of Mercury-192)Nuclide mass:191.9217524 u (calculated nuclear mass without electrons)Mass excess:-32.01172 MeVMass defect:1.630839152 u (per nucleus)Nuclear binding energy:1519.11688505 MeV (per nucleus)
7.91206711 MeV (average binding energy per nucleon)Separation energy:S_N = 9.491(27) MeV (first neutron)
S_P = 5.503(16) MeV (first proton)Half-life:4.85(20) hDecay constant λ:3.969915123481 × 10^-5 s^-1Specific activity α:1.251695710764 × 10⁺¹⁷ Bq g^-1
3382961.3804446 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.4232(35) femtometer fmYear of discovery:1952

Radioactive Decay

Half-life T_½ = 4.85(20) h (hours) respectively 1.7460 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	¹⁹²Au	100 %	0.761(22) MeV

Parent Nuclides

Direct parent isotope is: ¹⁹²Tl.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 112) and isobaric (same nucleon number A = 192) with Mercury-192. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 112	Isobar A = 192
70	¹⁸²Yb
71	¹⁸³Lu
72	¹⁸⁴Hf
73	¹⁸⁵Ta	¹⁹²Ta
74	¹⁸⁶W	¹⁹²W
75	¹⁸⁷Re	¹⁹²Re
76	¹⁸⁸Os	¹⁹²Os
77	¹⁸⁹Ir	¹⁹²Ir
78	¹⁹⁰Pt	¹⁹²Pt
79	¹⁹¹Au	¹⁹²Au
80	¹⁹²Hg	¹⁹²Hg
81	¹⁹³Tl	¹⁹²Tl
82	¹⁹⁴Pb	¹⁹²Pb
83	¹⁹⁵Bi	¹⁹²Bi
84	¹⁹⁶Po	¹⁹²Po
85	¹⁹⁷At	¹⁹²At
86	¹⁹⁸Rn
87	¹⁹⁹Fr