Mercury-211

Properties and data of the isotope ²¹¹Hg.

Contents

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

General data

Name of the isotope:Mercury-211; Hg-211Symbol:²¹¹Hg or 21180HgMass number A:211 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:131Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.6375 (= neutron-proton ratio)Neutron excess (N-Z):51Isotopic mass:210.99933(21) u (atomic weight of Mercury-211)Nuclide mass:210.9554484 u (calculated nuclear mass without electrons)Mass excess:-0.6241 MeVMass defect:1.761776556 u (per nucleus)Nuclear binding energy:1641.08429125 MeV (per nucleus)
7.77765067 MeV (average binding energy per nucleon)Separation energy:S_N = 3.33(28) MeV (first neutron)
S_P = 10.24(45) MeV (first proton)Half-life:300 nsDecay constant λ:2310490.6018665 s^-1Specific activity α:6.594380953293 × 10⁺²⁷ Bq g^-1
1.782265122511 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)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^-	²¹¹Tl	?	5.45(20) MeV
β^-, n	²¹⁰Tl	?	0.55(20) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 131) and isobaric (same nucleon number A = 211) with Mercury-211. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 131	Isobar A = 211
79	²¹⁰Au
80	²¹¹Hg	²¹¹Hg
81	²¹²Tl	²¹¹Tl
82	²¹³Pb	²¹¹Pb
83	²¹⁴Bi	²¹¹Bi
84	²¹⁵Po	²¹¹Po
85	²¹⁶At	²¹¹At
86	²¹⁷Rn	²¹¹Rn
87	²¹⁸Fr	²¹¹Fr
88	²¹⁹Ra	²¹¹Ra
89	²²⁰Ac	²¹¹Ac
90	²²¹Th	²¹¹Th
91	²²²Pa	²¹¹Pa
92	²²³U
93	²²⁴Np