Mercury-216

Properties and data of the isotope ²¹⁶Hg.

Contents

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

General data

Name of the isotope:Mercury-216; Hg-216Symbol:²¹⁶Hg or 21680HgMass number A:216 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:136Isotopic mass:216.02132(43) u (atomic weight of Mercury-216)Nuclide mass:215.9774384 u (calculated nuclear mass without electrons)Mass excess:19.85945 MeVMass defect:1.783111136 u (per nucleus)Nuclear binding energy:1660.95732452 MeV (per nucleus)
7.68961724 MeV (average binding energy per nucleon)Separation energy:S_N = 4.42(57) MeV (first neutron)Half-life:> 300 nsDecay constant λ:2310490.6018665 s^-1Specific activity α:6.441712898148 × 10⁺²⁷ Bq g^-1
1.74100348598 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2010

Radioactive Decay

Half-life T_½ = > 300 ns respectively 3.0 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²¹⁶Tl	?	5.14(50) MeV
β^-, n	²¹⁵Tl	?	1.88(50) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 136) and isobaric (same nucleon number A = 216) with Mercury-216. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 136	Isobar A = 216
80	²¹⁶Hg	²¹⁶Hg
81	²¹⁷Tl	²¹⁶Tl
82	²¹⁸Pb	²¹⁶Pb
83	²¹⁹Bi	²¹⁶Bi
84	²²⁰Po	²¹⁶Po
85	²²¹At	²¹⁶At
86	²²²Rn	²¹⁶Rn
87	²²³Fr	²¹⁶Fr
88	²²⁴Ra	²¹⁶Ra
89	²²⁵Ac	²¹⁶Ac
90	²²⁶Th	²¹⁶Th
91	²²⁷Pa	²¹⁶Pa
92	²²⁸U	²¹⁶U
93	²²⁹Np
94	²³⁰Pu
95	²³¹Am
96	²³²Cm
97	²³³Bk