Mercury-174

Properties and data of the isotope ¹⁷⁴Hg.

Contents

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

General data

Name of the isotope:Mercury-174; Hg-174Symbol:¹⁷⁴Hg or 17480HgMass number A:174 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:94Isotopic mass:173.992871(21) u (atomic weight of Mercury-174)Nuclide mass:173.9489894 u (calculated nuclear mass without electrons)Mass excess:-6.64062 MeVMass defect:1.447633664 u (per nucleus)Nuclear binding energy:1348.46207221 MeV (per nucleus)
7.74978202 MeV (average binding energy per nucleon)Separation energy:S_N = 12.0(2) MeV (first neutron)
S_P = 1.10(3) MeV (first proton)Half-life:2.1 msDecay constant λ:330.07008598093 s^-1Specific activity α:1.148976041288 × 10⁺²⁴ Bq g^-1
31053406521303 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1997

Radioactive Decay

Half-life T_½ = 2.1 ms respectively 2.1 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁰Pt	99.6(4) %	7.233(6) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 94) and isobaric (same nucleon number A = 174) with Mercury-174. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 94	Isobar A = 174
54	¹⁴⁸Xe
55	¹⁴⁹Cs
56	¹⁵⁰Ba
57	¹⁵¹La
58	¹⁵²Ce
59	¹⁵³Pr
60	¹⁵⁴Nd
61	¹⁵⁵Pm
62	¹⁵⁶Sm
63	¹⁵⁷Eu
64	¹⁵⁸Gd
65	¹⁵⁹Tb
66	¹⁶⁰Dy	¹⁷⁴Dy
67	¹⁶¹Ho	¹⁷⁴Ho
68	¹⁶²Er	¹⁷⁴Er
69	¹⁶³Tm	¹⁷⁴Tm
70	¹⁶⁴Yb	¹⁷⁴Yb
71	¹⁶⁵Lu	¹⁷⁴Lu
72	¹⁶⁶Hf	¹⁷⁴Hf
73	¹⁶⁷Ta	¹⁷⁴Ta
74	¹⁶⁸W	¹⁷⁴W
75	¹⁶⁹Re	¹⁷⁴Re
76	¹⁷⁰Os	¹⁷⁴Os
77	¹⁷¹Ir	¹⁷⁴Ir
78	¹⁷²Pt	¹⁷⁴Pt
79	¹⁷³Au	¹⁷⁴Au
80	¹⁷⁴Hg	¹⁷⁴Hg