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Isotopes of mercury

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Isotopes ofmercury (₈₀Hg)

Main isotopes^[1]			Decay
	abundance	half-life(t_1/2)	mode	product
¹⁹⁴Hg	synth	444 y	ε	¹⁹⁴Au
¹⁹⁵Hg	synth	9.9 h	β⁺	¹⁹⁵Au
¹⁹⁶Hg	0.15%	stable
¹⁹⁷Hg	synth	64.14 h	ε	¹⁹⁷Au
¹⁹⁸Hg	10.0%	stable
¹⁹⁹Hg	16.9%	stable
²⁰⁰Hg	23.1%	stable
²⁰¹Hg	13.2%	stable
²⁰²Hg	29.7%	stable
²⁰³Hg	synth	46.612 d	β⁻	²⁰³Tl
²⁰⁴Hg	6.82%	stable

Standard atomic weightA_r°(Hg)

200.592±0.003^[2]
200.59±0.01 (abridged)^[3]

There are seven stableisotopes ofmercury (₈₀Hg) with²⁰²Hg being the most abundant (29.86%). The longest-livedradioisotopes are¹⁹⁴Hg with ahalf-life of 444 years, and²⁰³Hg with a half-life of 46.612 days. Most of the remaining 40radioisotopes have half-lives that are less than a day.¹⁹⁹Hg and²⁰¹Hg are the most often studiedNMR-active nuclei, havingspin quantum numbers of 1/2 and 3/2 respectively. All isotopes of mercury are either radioactive orobservationally stable, meaning that they are predicted to be radioactive but no actual decay has been observed. These isotopes are predicted to undergo eitheralpha decay ordouble beta decay.

List of isotopes

[edit]

Nuclide ^{[n 1]}	Z	N	Isotopic mass(Da)^[4] ^{[n 2]}^{[n 3]}	Half-life^[1] ^{[n 4]}	Decay mode^[1] ^{[n 5]}	Daughter isotope ^{[n 6]}	Spin and parity^[1] ^{[n 7]}^{[n 4]}	Natural abundance(mole fraction)
Nuclide ^{[n 1]}	Excitation energy^{[n 4]}			Half-life^[1] ^{[n 4]}	Decay mode^[1] ^{[n 5]}	Daughter isotope ^{[n 6]}	Spin and parity^[1] ^{[n 7]}^{[n 4]}	Normal proportion^[1]	Range of variation
¹⁷⁰Hg	80	90	170.00581(32)#	310(250) μs	α	¹⁶⁶Pt	0+
¹⁷¹Hg	80	91	171.00359(33)#	70(30) μs	α	¹⁶⁷Pt	3/2−#
¹⁷²Hg	80	92	171.99886(16)	231(9) μs	α	¹⁶⁸Pt	0+
¹⁷³Hg	80	93	172.99714(22)#	800(80) μs	α	¹⁶⁹Pt	(7/2−)
¹⁷⁴Hg	80	94	173.992871(21)	2.0(4) ms	α	¹⁷⁰Pt	0+
¹⁷⁵Hg	80	95	174.99144(9)	10.2(3) ms	α	¹⁷¹Pt	(7/2−)
^175mHg	494(2) keV			340(30) ns	IT	¹⁷⁵Hg	(13/2+)
¹⁷⁶Hg	80	96	175.987349(12)	20.3(14) ms	α (90%)	¹⁷²Pt	0+
¹⁷⁶Hg	80	96	175.987349(12)	20.3(14) ms	β⁺ (10%)	¹⁷⁶Au	0+
¹⁷⁷Hg	80	97	176.98628(9)	117(7) ms	α	¹⁷³Pt	7/2−
^177mHg	323.2(13) keV			1.50(15) μs	IT	¹⁷⁷Hg	13/2+
¹⁷⁸Hg	80	98	177.982485(12)	266.5(24) ms	α (89%)	¹⁷⁴Pt	0+
¹⁷⁸Hg	80	98	177.982485(12)	266.5(24) ms	β⁺ (11%)	¹⁷⁸Au	0+
¹⁷⁹Hg	80	99	178.98182(3)	1.05(3) s	α (75%)	¹⁷⁵Pt	7/2−
					β⁺ (25%)	¹⁷⁹Au
					β⁺,p (0.15%)	¹⁷⁸Pt
^179mHg	171.4(4) keV			6.4(9) μs	IT	¹⁷⁹Hg	13/2+
¹⁸⁰Hg	80	100	179.978260(14)	2.59(1) s	β⁺ (52%)	¹⁸⁰Au	0+
¹⁸⁰Hg	80	100	179.978260(14)	2.59(1) s	α (48%)	¹⁷⁶Pt	0+
¹⁸¹Hg	80	101	180.977819(17)	3.6(1) s	β⁺ (73%)	¹⁸¹Au	1/2−
					α (27%)	¹⁷⁷Pt
					β⁺, p (0.014%)	¹⁸⁰Pt
					β⁺, α (9×10⁻⁶%)	¹⁷⁷Ir
^181mHg	210(50) keV			480(20) μs	IT	¹⁸¹Hg	13/2+
¹⁸²Hg	80	102	181.974689(11)	10.83(6) s	β⁺ (86.2%)	¹⁸²Au	0+
					α (13.8%)	¹⁷⁸Pt
					β⁺, p (<1×10⁻⁵%)	¹⁸¹Pt
¹⁸³Hg	80	103	182.974445(8)	9.4(7) s	β⁺ (88.3%)	¹⁸³Au	1/2−
					α (11.7%)	¹⁷⁹Pt
					β⁺, p (2.6×10⁻⁴%)	¹⁸²Pt
^183mHg	204(14) keV			>5# μs			13/2+#
¹⁸⁴Hg	80	104	183.971718(10)	30.87(26) s	β⁺ (98.89%)	¹⁸⁴Au	0+
¹⁸⁴Hg	80	104	183.971718(10)	30.87(26) s	α (1.11%)	¹⁸⁰Pt	0+
¹⁸⁵Hg	80	105	184.971891(15)	49.1(10) s	β⁺ (94%)	¹⁸⁵Au	1/2−
¹⁸⁵Hg	80	105	184.971891(15)	49.1(10) s	α (6%)	¹⁸¹Pt	1/2−
^185mHg	103.7(4) keV			21.6(15) s	IT (54%)	¹⁸⁵Hg	13/2+
					β⁺ (46%)	¹⁸⁵Au
					α (0.03%)	¹⁸¹Pt
¹⁸⁶Hg	80	106	185.969362(13)	1.38(6) min	β⁺ (99.98%)	¹⁸⁶Au	0+
¹⁸⁶Hg	80	106	185.969362(13)	1.38(6) min	α (0.016%)	¹⁸²Pt	0+
^186mHg	2217.3(4) keV			82(5) μs	IT	¹⁸⁶Hg	(8−)
¹⁸⁷Hg	80	107	186.969814(14)	1.9(3) min	β⁺	¹⁸⁷Au	3/2−
^187mHg	58(14) keV			2.4(3) min	β⁺	¹⁸⁷Au	13/2+
¹⁸⁸Hg	80	108	187.967581(7)	3.25(15) min	β⁺	¹⁸⁸Au	0+
¹⁸⁸Hg	80	108	187.967581(7)	3.25(15) min	α (3.7×10⁻⁵%)	¹⁸⁴Pt	0+
^188mHg	2724.1(4) keV			142(14) ns	IT	¹⁸⁸Hg	12+
¹⁸⁹Hg	80	109	188.96819(3)	7.6(2) min	β⁺	¹⁸⁹Au	3/2−
^189mHg	80(30) keV			8.6(2) min	β⁺	¹⁸⁹Au	13/2+
¹⁹⁰Hg	80	110	189.966322(17)	20.0(5) min	β⁺	¹⁹⁰Au	0+
¹⁹¹Hg	80	111	190.967158(24)	49(10) min	β⁺	¹⁹¹Au	3/2−
^191mHg	128(22) keV			50.8(15) min	β⁺	¹⁹¹Au	13/2+
¹⁹²Hg	80	112	191.965634(17)	4.85(20) h	EC	¹⁹²Au	0+
¹⁹³Hg	80	113	192.966653(17)	3.80(15) h	β⁺	¹⁹³Au	3/2−
^193mHg	140.76(5) keV			11.8(2) h	β⁺ (92.8%)	¹⁹³Au	13/2+
^193mHg	140.76(5) keV			11.8(2) h	IT (7.2%)	¹⁹³Hg	13/2+
¹⁹⁴Hg	80	114	193.965449(3)	447(28) y	EC	¹⁹⁴Au	0+
¹⁹⁵Hg	80	115	194.966706(25)	10.69(16) h	β⁺	¹⁹⁵Au	1/2−
^195mHg	176.07(4) keV			41.60(19) h	IT (54.2%)	¹⁹⁵Hg	13/2+
^195mHg	176.07(4) keV			41.60(19) h	β⁺ (45.8%)	¹⁹⁵Au	13/2+
¹⁹⁶Hg	80	116	195.965833(3)	Observationally Stable^{[n 8]}			0+	0.0015(1)
¹⁹⁷Hg	80	117	196.967214(3)	64.93(7) h	EC	¹⁹⁷Au	1/2−
^197mHg	298.93(8) keV			23.82(4) h	IT (94.68%)	¹⁹⁷Hg	13/2+
^197mHg	298.93(8) keV			23.82(4) h	EC (5.32%)	¹⁹⁷Au	13/2+
¹⁹⁸Hg	80	118	197.9667692(5)	Observationally Stable^{[n 9]}			0+	0.1004(3)
¹⁹⁹Hg	80	119	198.9682810(6)	Observationally Stable^{[n 10]}			1/2−	0.1694(12)
^199mHg	532.48(10) keV			42.67(9) min	IT	¹⁹⁹Hg	13/2+
²⁰⁰Hg	80	120	199.9683269(6)	Observationally Stable^{[n 11]}			0+	0.2314(9)
²⁰¹Hg	80	121	200.9703031(8)	Observationally Stable^{[n 12]}			3/2−	0.1317(9)
^201mHg	766.22(15) keV			94.0(20) μs	IT	²⁰¹Hg	13/2+
²⁰²Hg	80	122	201.9706436(8)	Observationally Stable^{[n 13]}			0+	0.2974(13)
²⁰³Hg	80	123	202.9728724(18)	46.610(10) d	β⁻	²⁰³Tl	5/2−
^203m1Hg	933.14(23) keV			22.1(10) μs	IT	²⁰³Hg	(13/2+)
^203m2Hg	8281.3(5) keV			146(30) ns	IT	²⁰³Hg	(53/2+)
²⁰⁴Hg	80	124	203.9734940(5)	Observationally Stable^{[n 14]}			0+	0.0682(4)
^204mHg	7226.08(17) keV			~485 ns	IT	²⁰⁴Hg	22+
²⁰⁵Hg	80	125	204.976073(4)	5.14(9) min	β⁻	²⁰⁵Tl	1/2−
^205m1Hg	1556.4(3) keV			1.09(4) ms	IT	²⁰⁵Hg	13/2+
^205m2Hg	3316.6(8) keV			5.89(18) μs	IT	²⁰⁵Hg	(23/2−)
²⁰⁶Hg	80	126	205.977514(22)	8.32(7) min	β⁻	²⁰⁶Tl	0+	Trace^{[n 15]}
^206m1Hg	2102.4(3) keV			2.088(17) μs	IT	²⁰⁶Hg	5−
^206m2Hg	3722.3(10) keV			106(3) ns	IT	²⁰⁶Hg	(10+)
²⁰⁷Hg	80	127	206.98230(3)	2.9(2) min	β⁻	²⁰⁷Tl	9/2+
²⁰⁸Hg	80	128	207.98576(3)	135(10) s	β⁻	²⁰⁸Tl	0+
^208mHg	1338(24) keV			99(14) ns	IT	²⁰⁸Hg	(8+)
²⁰⁹Hg	80	129	208.99076(16)#	6.3(11) s	β⁻	²⁰⁹Tl	9/2+#
²¹⁰Hg	80	130	209.99431(22)#	64(12) s	β⁻ (97.8%)	²¹⁰Tl	0+
²¹⁰Hg	80	130	209.99431(22)#	64(12) s	β⁻,n (2.2%)	²⁰⁹Tl	0+
^210m1Hg	663(2) keV			2.1(7) μs	IT	²¹⁰Hg	(3−)
^210m2Hg	1406(23) keV			2(1) μs	IT	²¹⁰Hg	8+#
²¹¹Hg	80	131	210.99958(22)#	26.4(81) s	β⁻ (93.7%)	²¹¹Tl	9/2+#
²¹¹Hg	80	131	210.99958(22)#	26.4(81) s	β⁻, n (6.3%)	²¹⁰Tl	9/2+#
²¹²Hg	80	132	212.00324(32)#	30# s [>300 ns]			0+
²¹³Hg	80	133	213.00880(32)#	15# s [>300 ns]			9/2+#
²¹⁴Hg	80	134	214.01264(43)#	8# s [>300 ns]			0+
²¹⁵Hg	80	135	215.01837(43)#	600# ms [>300 ns]			9/2+#
²¹⁶Hg	80	136	216.02246(43)#	2# s [>300 ns]			0+
This table header & footer: view

^^mHg – Excitednuclear isomer.
^( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
^# – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
^^a ^b ^c# – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
^Modes of decay:
EC: Electron capture

IT: Isomeric transition
^Bold symbol as daughter – Daughter product is stable.
^( ) spin value – Indicates spin with weak assignment arguments.
^Believed to undergo β⁺β⁺ decay to¹⁹⁶Pt with a half-life over 2.5×10¹⁸ years; also theorized to undergo α decay to¹⁹²Pt
^Believed to undergo α decay to¹⁹⁴Pt
^Believed to undergo α decay to¹⁹⁵Pt
^Believed to undergo α decay to¹⁹⁶Pt
^Believed to undergo α decay to¹⁹⁷Pt
^Believed to undergo α decay to¹⁹⁸Pt
^Believed to undergo β⁻β⁻ decay to²⁰⁴Pb
^Intermediatedecay product of²³⁸U

References

[edit]

^^a ^b ^c ^d ^eKondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021)."The NUBASE2020 evaluation of nuclear properties"(PDF).Chinese Physics C.45 (3): 030001.doi:10.1088/1674-1137/abddae.
^"Standard Atomic Weights: Mercury".CIAAW. 2011.
^Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04)."Standard atomic weights of the elements 2021 (IUPAC Technical Report)".Pure and Applied Chemistry.doi:10.1515/pac-2019-0603.ISSN 1365-3075.
^Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*".Chinese Physics C.45 (3): 030003.doi:10.1088/1674-1137/abddaf.

Isotopic compositions and standard atomic masses from:
- de Laeter, John Robert; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003)."Atomic weights of the elements. Review 2000 (IUPAC Technical Report)".Pure and Applied Chemistry.75 (6):683–800.doi:10.1351/pac200375060683.
- Wieser, Michael E. (2006)."Atomic weights of the elements 2005 (IUPAC Technical Report)".Pure and Applied Chemistry.78 (11):2051–2066.doi:10.1351/pac200678112051.
"News & Notices: Standard Atomic Weights Revised".International Union of Pure and Applied Chemistry. 19 October 2005.
Half-life, spin, and isomer data selected from the following sources.
- Audi, Georges; Bersillon, Olivier; Blachot, Jean;Wapstra, Aaldert Hendrik (2003),"The NUBASE evaluation of nuclear and decay properties",Nuclear Physics A,729:3–128,Bibcode:2003NuPhA.729....3A,doi:10.1016/j.nuclphysa.2003.11.001
- Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017)."The NUBASE2016 evaluation of nuclear properties"(PDF).Chinese Physics C.41 (3): 030001.Bibcode:2017ChPhC..41c0001A.doi:10.1088/1674-1137/41/3/030001.
- National Nuclear Data Center."NuDat 2.x database".Brookhaven National Laboratory.
- Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.).CRC Handbook of Chemistry and Physics (85th ed.).Boca Raton, Florida:CRC Press.ISBN 978-0-8493-0485-9.

Isotopes of thechemical elements

Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period	Hydrogen and alkali metals	Alkaline earth metals													Pnictogens	Chalcogens	Halogens	Noble gases
①	Isotopes § List H 1																	Isotopes § List He 2
②	Isotopes § List Li 3	Isotopes § List Be 4											Isotopes § List B 5	Isotopes § List C 6	Isotopes § List N 7	Isotopes § List O 8	Isotopes § List F 9	Isotopes § List Ne 10
③	Isotopes § List Na 11	Isotopes § List Mg 12											Isotopes § List Al 13	Isotopes § List Si 14	Isotopes § List P 15	Isotopes § List S 16	Isotopes § List Cl 17	Isotopes § List Ar 18
④	Isotopes § List K 19	Isotopes § List Ca 20	Isotopes § List Sc 21	Isotopes § List Ti 22	Isotopes § List V 23	Isotopes § List Cr 24	Isotopes § List Mn 25	Isotopes § List Fe 26	Isotopes § List Co 27	Isotopes § List Ni 28	Isotopes § List Cu 29	Isotopes § List Zn 30	Isotopes § List Ga 31	Isotopes § List Ge 32	Isotopes § List As 33	Isotopes § List Se 34	Isotopes § List Br 35	Isotopes § List Kr 36
⑤	Isotopes § List Rb 37	Isotopes § List Sr 38	Isotopes § List Y 39	Isotopes § List Zr 40	Isotopes § List Nb 41	Isotopes § List Mo 42	Isotopes § List Tc 43	Isotopes § List Ru 44	Isotopes § List Rh 45	Isotopes § List Pd 46	Isotopes § List Ag 47	Isotopes § List Cd 48	Isotopes § List In 49	Isotopes § List Sn 50	Isotopes § List Sb 51	Isotopes § List Te 52	Isotopes § List I 53	Isotopes § List Xe 54
⑥	Isotopes § List Cs 55	Isotopes § List Ba 56	Isotopes § List Lu 71	Isotopes § List Hf 72	Isotopes § List Ta 73	Isotopes § List W 74	Isotopes § List Re 75	Isotopes § List Os 76	Isotopes § List Ir 77	Isotopes § List Pt 78	Isotopes § List Au 79	Isotopes § List Hg 80	Isotopes § List Tl 81	Isotopes § List Pb 82	Isotopes § List Bi 83	Isotopes § List Po 84	Isotopes § List At 85	Isotopes § List Rn 86
⑦	Isotopes § List Fr 87	Isotopes § List Ra 88	Isotopes § List Lr 103	Isotopes § List Rf 104	Isotopes § List Db 105	Isotopes § List Sg 106	Isotopes § List Bh 107	Isotopes § List Hs 108	Isotopes § List Mt 109	Isotopes § List Ds 110	Isotopes § List Rg 111	Isotopes § List Cn 112	Isotopes § List Nh 113	Isotopes § List Fl 114	Isotopes § List Mc 115	Isotopes § List Lv 116	Isotopes § List Ts 117	Isotopes § List Og 118
⑧	Isotopes § List Uue 119	Isotopes § List Ubn 120

			Isotopes § List La 57	Isotopes § List Ce 58	Isotopes § List Pr 59	Isotopes § List Nd 60	Isotopes § List Pm 61	Isotopes § List Sm 62	Isotopes § List Eu 63	Isotopes § List Gd 64	Isotopes § List Tb 65	Isotopes § List Dy 66	Isotopes § List Ho 67	Isotopes § List Er 68	Isotopes § List Tm 69	Isotopes § List Yb 70
			Isotopes § List Ac 89	Isotopes § List Th 90	Isotopes § List Pa 91	Isotopes § List U 92	Isotopes § List Np 93	Isotopes § List Pu 94	Isotopes § List Am 95	Isotopes § List Cm 96	Isotopes § List Bk 97	Isotopes § List Cf 98	Isotopes § List Es 99	Isotopes § List Fm 100	Isotopes § List Md 101	Isotopes § List No 102

Authority control databases: National	United States Israel

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