73 – Tantalum, Ta

PERIODIC TABLE

Spectrograph
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Elemental Tile
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Tantalum - Columbite Tantalite
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Tantalum is a rare, hard, blue-grey, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys. With its chemical inertness, it makes a valuable substance for laboratory equipment and a substitute for platinum. Tantalum is also used for medical implants and bone repair and its main use today is in tantalum capacitors in electronic equipment and is chemically similar to niobium.

1802 by Anders Ekeberg, Sweden.

DISCOVERY

Greek 'Tantalos' meaning 'father of Niobe' (Greek mythology).

ETYMOLOGY

Tantalum

Element

Ta

Symbol

73 Atomic Number

Transition Metal

Classification

7440-25-7

CAS Number

Grey

Elemental Colour

-

Refractive Index

0.340 Poisson Ratio

10.868 cm³

Molar Volume

800.00M Pa, 7.895'4k Atm

7.895'4k Atm

Brinell Hardness

6.50 Mohs Hardness

873.00M Pa, 8.615'8k Atm

8.615'8k Atm

Vickers Hardness

3,400 m/s, Mach 9.912'5

3,400 m/s

Speed of Sound

200.00G Pa, 1.973'8M Atm

1.973'8M Atm

Bulk Modulus

69.00G Pa, 680.977'1k Atm

680.977'1k Atm

Shear Modulus

186.00G Pa, 1.835'7M Atm

1.835'7M Atm

Young Modulus

Allotropes

NONE

3,290.15 K, 3,017.00 °C

3,017.00 °C

Melting Point

5,731.15 K, 5,458.00 °C

5,458.00 °C

Boiling Point

-

Automatic Ignition

-

Flashpoint

-

Critical Temperature

-

Critical Pressure

57.000'000 W/(m K)

Thermal Conductivity

0.000'006'3 K^-1

Thermal Expansion

140.00 J/(kg K)

Specific Heat

36.000 kJ/mol

Heat Fusion

735.000 kJ/mol

Heat Vaporisation

-

Heat Combustion

-

Curie Point

-

Neel Point

-

Adiabatic Index

Solid

Phase

Conductor

Electrical Type

7.70M S/m

Conductivity

130.00n Ω.m

Resistivity

4.470 K

Superconducting Point

-

Magnetic Type

0.000'000'010'7

Mass Susceptibility

0.000'000'001'936'00

Molar Susceptibility

0.000'178'200'00

Volume Susceptibility

Material Composition

0.000'000'02 %

Universe

0.000'002 %

Meteorites

-

Sun

0.000'17 %

Earth Crust

0.000'000'000'2 %

Oceans

-

Humans

180.947'875'7

Atomic Weight

193 pm

Atomic Radius

146 pm

Covalent Radius Single Bond

126 pm

Covalent Radius Double Bond

119 pm

Covalent Radius Triple Bond

217 pm

Van der Waals Radius

[Xe]6s²4f¹⁴5d³

Electron Configuration

Cubic, Body-centred

Crystal Structure

16.650'00 g/cm³

Density as Solid

15.000'00 g/cm³

Density as Liquid

-

Density as Gas

lm_3m

Space Group Name

229 Space Group Number

π/2, π/2 & π/2

Lattice Angles

330.13, 330.13 & 330.13 pm

Lattice Constants

5 Valence

1.5 Electronegativity

31.17 kJ/mol

Electron Affinity

Ionisation Energy

Stable

Half Life

Stable

Lifetime

5d³ = 5, 2, 0, +1/2

Quantum Numbers

6.010'00 b σ_s

Neutron Cross Section

20.600'00 b σ_a

Neutron Mass Absorption

Stable Isotopes

Unstable Isotopes

Isotopes Overview

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment		Quadrupole Moment		Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	A03 Decay Probability		A03 Decay Mode	A03 Decay Energy		A03 Decay Daughter	A03 Decay Link	Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide	Y06 Decay Product Yield		Y06 Decay Product Nuclide	Y07 Decay Product Yield		Y07 Decay Product Nuclide	Y08 Decay Product Yield		Y08 Decay Product Nuclide	Y09 Decay Product Yield		Y09 Decay Product Nuclide
Isotope_073_ta_155_u	Unstable	¹⁵⁵Ta	Boson	73	p	82	n	11/2	-1	154.974'592'000'0	u	~ 0	%	~ 0	-23.668'000'000'0	MeV	7.856'000'000'0	MeV	-		-		4.12E-13	year	13.000	micro-seconds ( x⁻⁶ )	100.000'000	%	p	1,776.000	keV	¹⁵⁴Hf	¹⁵⁵Ta > [ 100 % , p , 1,776.0 keV ] > ¹⁵⁴Hf													?	%	¹⁴²Nd	?	%	¹⁵⁰Sm	?	%	¹⁵⁴Gd
Isotope_073_ta_156_u	Unstable	¹⁵⁶Ta	Fermion	73	p	83	n	2	-1	155.972'303'000'0	u	~ 0	%	~ 0	-25.799'000'000'0	MeV	7.871'000'000'0	MeV	-		-		4.56E-12	year	144.000	micro-seconds ( x⁻⁶ )	100.000'000	%	p	1,013.600	keV	¹⁵⁵Hf	¹⁵⁶Ta > [ 100 % , p , 1,013.6 keV ] > ¹⁵⁵Hf	β+	11,031.000	keV	¹⁵⁶Hf	¹⁵⁶Ta > [ , β+ , 11,031.0 keV ] > ¹⁵⁶Hf								64.796'160	%	¹⁵¹Eu	23.210'507	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹⁵⁵Gd	?	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁵⁰Sm	?	%	¹⁵⁶Gd
Isotope_073_ta_157_u	Unstable	¹⁵⁷Ta	Boson	73	p	84	n	1/2	1	156.968'192'445'0	u	~ 0	%	~ 0	-29.628'547'000'0	MeV	7.896'268'000'0	MeV	-		-		3.20E-13	year	10.100	micro-seconds ( x⁻⁶ )	96.000'000	%	α	6,354.520	keV	¹⁵³Lu	¹⁵⁷Ta > [ 96 % , α , 6,354.52 keV ] > ¹⁵³Lu	p	934.650	keV	¹⁵⁶Hf	¹⁵⁷Ta > [ , p , 934.65 keV ] > ¹⁵⁶Hf	1.000'000	%	β+	8,104.000	keV	¹⁵⁷Hf	¹⁵⁷Ta > [ 1 % , β+ , 8,104.0 keV ] > ¹⁵⁷Hf	12.740'353	%	¹⁴⁵Nd	0.290'433	%	¹⁴⁰Ce	0.000'000	%	¹⁴¹Pr	?	%	¹⁴³Nd	?	%	¹⁵⁷Gd	?	%	¹⁵³Eu	?	%	¹⁵¹Eu	?	%	¹⁵²Sm	?	%	¹⁵⁶Gd
Isotope_073_ta_158_u	Unstable	¹⁵⁸Ta	Fermion	73	p	85	n	2	-1	157.966'699'000'0	u	~ 0	%	~ 0	-31.019'000'000'0	MeV	7.906'000'000'0	MeV	-		-		1.55E-12	year	49.000	micro-seconds ( x⁻⁶ )	96.000'000	%	α	6,123.500	keV	¹⁵⁴Lu	¹⁵⁸Ta > [ 96 % , α , 6,123.5 keV ] > ¹⁵⁴Lu	β+	10,063.000	keV	¹⁵⁸Hf	¹⁵⁸Ta > [ , β+ , 10,063.0 keV ] > ¹⁵⁸Hf								?	%	¹⁴²Nd	?	%	¹⁵⁴Gd	?	%	¹⁵⁰Sm	?	%	¹⁵⁸Gd
Isotope_073_ta_159_u	Unstable	¹⁵⁹Ta	Boson	73	p	86	n	1/2	1	158.963'018'173'0	u	~ 0	%	~ 0	-34.448'350'000'0	MeV	7.928'783'000'0	MeV	-		-		3.30E-8	year	1.040	seconds ( x⁰ )	66.000'000	%	β+	7,383.000	keV	¹⁵⁹Hf	¹⁵⁹Ta > [ 66 % , β+ , 7,383.0 keV ] > ¹⁵⁹Hf	α	5,680.910	keV	¹⁵⁵Lu	¹⁵⁹Ta > [ , α , 5,680.91 keV ] > ¹⁵⁵Lu								42.900'000	%	¹⁵⁹Tb	37.205'373	%	¹⁵¹Eu	13.327'107	%	¹⁴³Nd	2.534'806	%	¹⁵⁵Gd
Isotope_073_ta_160_u	Unstable	¹⁶⁰Ta	Fermion	73	p	87	n	2	-1	159.961'486'056'0	u	~ 0	%	~ 0	-35.875'507'000'0	MeV	7.938'593'000'0	MeV	-		-		5.39E-8	year	1.700	seconds ( x⁰ )	?	%	β+	9,039.500	keV	¹⁶⁰Hf	¹⁶⁰Ta > [ ? % , β+ , 9,039.5 keV ] > ¹⁶⁰Hf	α	5,449.500	keV	¹⁵⁶Lu	¹⁶⁰Ta > [ , α , 5,449.5 keV ] > ¹⁵⁶Lu								?	%	¹⁶⁰Dy	?	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁵⁶Gd
Isotope_073_ta_161_u	Unstable	¹⁶¹Ta	Boson	73	p	88	n	1/2	1	160.958'417'000'0	u	~ 0	%	~ 0	-38.734'000'000'0	MeV	7.957'000'000'0	MeV	-		-		9.51E-8	year	3.000	seconds ( x⁰ )	?	%	β+	6,562.800	keV	¹⁶¹Hf	¹⁶¹Ta > [ ? % , β+ , 6,562.8 keV ] > ¹⁶¹Hf	α	5,324.000	keV	¹⁵⁷Lu	¹⁶¹Ta > [ , α , 5,324.0 keV ] > ¹⁵⁷Lu								?	%	¹⁴¹Pr	?	%	¹⁴⁵Nd	?	%	¹⁵⁷Gd	?	%	¹⁵³Eu	?	%	¹⁶¹Dy
Isotope_073_ta_162_u	Unstable	¹⁶²Ta	Fermion	73	p	89	n	3	1	161.957'291'859'0	u	~ 0	%	~ 0	-39.782'377'000'0	MeV	7.964'348'000'0	MeV	-		-		1.13E-7	year	3.570	seconds ( x⁰ )	100.000'000	%	β+	8,368.500	keV	¹⁶²Hf	¹⁶²Ta > [ 100 % , β+ , 8,368.5 keV ] > ¹⁶²Hf	α	5,007.100	keV	¹⁵⁸Lu	¹⁶²Ta > [ , α , 5,007.1 keV ] > ¹⁵⁸Lu								0.000'677	%	¹⁴²Nd	?	%	¹⁵⁴Gd	?	%	¹⁵⁰Sm	?	%	¹⁵⁸Gd	?	%	¹⁶²Dy
Isotope_073_ta_163_u	Unstable	¹⁶³Ta	Boson	73	p	90	n	1/2	1	162.954'330'271'0	u	~ 0	%	~ 0	-42.541'078'000'0	MeV	7.981'929'000'0	MeV	-		-		3.36E-7	year	10.600	seconds ( x⁰ )	100.000'000	%	β+	5,723.000	keV	¹⁶³Hf	¹⁶³Ta > [ 100 % , β+ , 5,723.0 keV ] > ¹⁶³Hf	α	4,748.980	keV	¹⁵⁹Lu	¹⁶³Ta > [ , α , 4,748.98 keV ] > ¹⁵⁹Lu								100.000'000	%	¹⁶³Dy	0.200'100	%	¹⁵⁹Tb	0.000'196	%	¹⁵⁵Gd	0.000'003	%	¹⁵¹Eu	0.000'001	%	¹⁴³Nd
Isotope_073_ta_164_u	Unstable	¹⁶⁴Ta	Fermion	73	p	91	n	3	1	163.953'534'000'0	u	~ 0	%	~ 0	-43.282'801'000'0	MeV	7.986'997'000'0	MeV	-		-		4.50E-7	year	14.200	seconds ( x⁰ )	100.000'000	%	β+	7,516.500	keV	¹⁶⁴Hf	¹⁶⁴Ta > [ 100 % , β+ , 7,516.5 keV ] > ¹⁶⁴Hf													?	%	¹⁶⁴Dy	?	%	¹⁶⁰Dy
Isotope_073_ta_165_u	Unstable	¹⁶⁵Ta	Boson	73	p	92	n	5/2	-1	164.950'772'514'0	u	~ 0	%	~ 0	-45.855'107'000'0	MeV	8.003'098'000'0	MeV	-		-		9.83E-7	year	31.020	seconds ( x⁰ )	100.000'000	%	β+	4,758.200	keV	¹⁶⁵Hf	¹⁶⁵Ta > [ 100 % , β+ , 4,758.2 keV ] > ¹⁶⁵Hf													100.000'000	%	¹⁶⁵Ho
Isotope_073_ta_166_u	Unstable	¹⁶⁶Ta	Fermion	73	p	93	n	2	1	165.950'512'000'0	u	~ 0	%	~ 0	-46.097'776'000'0	MeV	8.004'971'000'0	MeV	-		-		1.09E-6	year	34.400	seconds ( x⁰ )	100.000'000	%	β+	6,739.000	keV	¹⁶⁶Hf	¹⁶⁶Ta > [ 100 % , β+ , 6,739.0 keV ] > ¹⁶⁶Hf													100.000'000	%	¹⁶⁶Er
Isotope_073_ta_167_u	Unstable	¹⁶⁷Ta	Boson	73	p	94	n	3/2	1	166.948'093'000'0	u	~ 0	%	~ 0	-48.351'060'000'0	MeV	8.018'861'000'0	MeV	-		-		2.53E-6	year	79.800	seconds ( x⁰ )	100.000'000	%	β+	4,094.500	keV	¹⁶⁷Hf	¹⁶⁷Ta > [ 100 % , β+ , 4,094.5 keV ] > ¹⁶⁷Hf													100.000'000	%	¹⁶⁷Er
Isotope_073_ta_168_u	Unstable	¹⁶⁸Ta	Fermion	73	p	95	n	?	0	167.948'047'000'0	u	~ 0	%	~ 0	-48.393'908'000'0	MeV	8.019'428'000'0	MeV	-		-		3.80E-6	year	120.000	seconds ( x⁰ )	100.000'000	%	β+	5,944.400	keV	¹⁶⁸Hf	¹⁶⁸Ta > [ 100 % , β+ , 5,944.4 keV ] > ¹⁶⁸Hf													?	%	¹⁶⁸Er	?	%	¹⁶⁴Dy	?	%	¹⁶⁰Dy
Isotope_073_ta_169_u	Unstable	¹⁶⁹Ta	Boson	73	p	96	n	5/2	1	168.946'011'000'0	u	~ 0	%	~ 0	-50.290'430'000'0	MeV	8.030'957'000'0	MeV	-		-		1.53E-7	year	4.833	seconds ( x⁰ )	100.000'000	%	β+	3,404.300	keV	¹⁶⁹Hf	¹⁶⁹Ta > [ 100 % , β+ , 3,404.3 keV ] > ¹⁶⁹Hf													100.000'000	%	¹⁶⁹Tm
Isotope_073_ta_170_u	Unstable	¹⁷⁰Ta	Fermion	73	p	97	n	3	1	169.946'175'000'0	u	~ 0	%	~ 0	-50.137'665'000'0	MeV	8.030'296'000'0	MeV	-		-		2.14E-7	year	6.767	seconds ( x⁰ )	100.000'000	%	β+	5,094.000	keV	¹⁷⁰Hf	¹⁷⁰Ta > [ 100 % , β+ , 5,094.0 keV ] > ¹⁷⁰Hf													100.000'000	%	¹⁷⁰Yb
Isotope_073_ta_171_u	Unstable	¹⁷¹Ta	Boson	73	p	98	n	5/2	-1	170.944'476'000'0	u	~ 0	%	~ 0	-51.720'273'000'0	MeV	8.039'791'000'0	MeV	-		-		7.38E-7	year	23.300	seconds ( x⁰ )	100.000'000	%	β+	2,688.900	keV	¹⁷¹Hf	¹⁷¹Ta > [ 100 % , β+ , 2,688.9 keV ] > ¹⁷¹Hf													100.000'000	%	¹⁷¹Yb
Isotope_073_ta_172_u	Unstable	¹⁷²Ta	Fermion	73	p	99	n	3	1	171.944'895'000'0	u	~ 0	%	~ 0	-51.329'977'000'0	MeV	8.037'705'000'0	MeV	-		-		1.17E-6	year	36.833	seconds ( x⁰ )	100.000'000	%	β+	4,051.400	keV	¹⁷²Hf	¹⁷²Ta > [ 100 % , β+ , 4,051.4 keV ] > ¹⁷²Hf													100.000'000	%	¹⁷²Yb
Isotope_073_ta_173_u	Unstable	¹⁷³Ta	Boson	73	p	100	n	5/2	-1	172.943'750'000'0	u	~ 0	%	~ 0	-52.396'538'000'0	MeV	8.044'064'000'0	MeV	1.703'000'000'0	nm	-1.900'000'000'0	b	3.58E-4	year	11.300	kilo-seconds ( x³ )	100.000'000	%	β+	1,993.000	keV	¹⁷³Hf	¹⁷³Ta > [ 100 % , β+ , 1,993.0 keV ] > ¹⁷³Hf													100.000'000	%	¹⁷³Yb
Isotope_073_ta_174_u	Unstable	¹⁷⁴Ta	Fermion	73	p	101	n	3	1	173.944'454'000'0	u	~ 0	%	~ 0	-51.740'766'000'0	MeV	8.040'452'000'0	MeV	-		-		1.30E-4	year	4.104	kilo-seconds ( x³ )	100.000'000	%	β+	3,083.700	keV	¹⁷⁴Hf	¹⁷⁴Ta > [ 100 % , β+ , 3,083.7 keV ] > ¹⁷⁴Hf													100.000'000	%	¹⁷⁰Yb	?	%	¹⁷⁴Yb
Isotope_073_ta_175_u	Unstable	¹⁷⁵Ta	Boson	73	p	102	n	7/2	1	174.943'737'000'0	u	~ 0	%	~ 0	-52.408'647'000'0	MeV	8.044'445'000'0	MeV	2.270'000'000'0	nm	3.650'000'000'0	b	1.20E-3	year	37.800	kilo-seconds ( x³ )	100.000'000	%	β+	1,053.000	keV	¹⁷⁵Hf	¹⁷⁵Ta > [ 100 % , β+ , 1,053.0 keV ] > ¹⁷⁵Hf													100.000'000	%	¹⁷⁵Lu
Isotope_073_ta_176_u	Unstable	¹⁷⁶Ta	Fermion	73	p	103	n	1	-1	175.944'857'000'0	u	~ 0	%	~ 0	-51.365'374'000'0	MeV	8.038'670'000'0	MeV	-		-		9.22E-4	year	29.099	kilo-seconds ( x³ )	100.000'000	%	β+	2,189.900	keV	¹⁷⁶Hf	¹⁷⁶Ta > [ 100 % , β+ , 2,189.9 keV ] > ¹⁷⁶Hf													100.000'000	%	¹⁷⁶Hf
Isotope_073_ta_177_u	Unstable	¹⁷⁷Ta	Boson	73	p	104	n	7/2	1	176.944'472'403'0	u	~ 0	%	~ 0	-51.723'623'000'0	MeV	8.040'878'000'0	MeV	2.250'000'000'0	nm	-		6.45E-3	year	203.602	kilo-seconds ( x³ )	100.000'000	%	β+	143.800	keV	¹⁷⁷Hf	¹⁷⁷Ta > [ 100 % , β+ , 143.8 keV ] > ¹⁷⁷Hf													100.000'000	%	¹⁷⁷Hf
Isotope_073_ta_178_u	Unstable	¹⁷⁸Ta	Fermion	73	p	105	n	1	1	177.945'778'221'0	u	~ 0	%	~ 0	-50.507'262'000'0	MeV	8.034'216'000'0	MeV	2.740'000'000'0	nm	0.650'000'000'0	b	1.77E-5	year	559.020	seconds ( x⁰ )	100.000'000	%	β+	914.800	keV	¹⁷⁸Hf	¹⁷⁸Ta > [ 100 % , β+ , 914.8 keV ] > ¹⁷⁸Hf													100.000'000	%	¹⁷⁸Hf
Isotope_073_ta_179_u	Unstable	¹⁷⁹Ta	Boson	73	p	106	n	7/2	1	178.945'929'535'0	u	~ 0	%	~ 0	-50.366'314'000'0	MeV	8.033'636'000'0	MeV	100.000'000'000'0	nm	-		1.82E+0	years	57.435	mega-seconds ( x⁶ )	100.000'000	%	ϵ	105.622	keV	¹⁷⁹Hf	¹⁷⁹Ta > [ 100 % , ϵ , 105.622 keV ] > ¹⁷⁹Hf													100.000'000	%	¹⁷⁹Hf
Isotope_073_ta_180_u	Unstable	¹⁸⁰Ta	Fermion	73	p	107	n	1	1	179.947'464'831'0	u	0.012'000	%	0.021'593'695'8	-48.936'195'000'0	MeV	8.025'900'000'0	MeV	-		-		9.30E-4	year	29.350	kilo-seconds ( x³ )	86.000'000	%	ϵ	852.200	keV	¹⁸⁰Hf	¹⁸⁰Ta > [ 86 % , ϵ , 852.2 keV ] > ¹⁸⁰Hf	β-	708.280	keV	¹⁸⁰W	¹⁸⁰Ta > [ , β- , 708.28 keV ] > ¹⁸⁰W								86.000'000	%	¹⁸⁰Hf	?	%	¹⁷⁶Hf
Isotope_073_ta_181_s	Stable	¹⁸¹Ta	Boson	73	p	108	n	7/2	1	180.947'995'763'0	u	99.988'000	%	180.926'282'003'5	-48.441'634'000'0	MeV	8.023'418'000'0	MeV	2.370'500'000'0	nm	3.280'000'000'0	b	-
Isotope_073_ta_182_u	Unstable	¹⁸²Ta	Fermion	73	p	109	n	3	-1	181.950'151'849'0	u	~ 0	%	~ 0	-46.433'254'000'0	MeV	8.012'647'000'0	MeV	3.020'000'000'0	nm	209.000'000'000'0	b	3.13E-1	year	9.887	mega-seconds ( x⁶ )	100.000'000	%	β-	1,814.260	keV	¹⁸²W	¹⁸²Ta > [ 100 % , β- , 1,814.26 keV ] > ¹⁸²W													?	%	¹⁷⁸Hf
Isotope_073_ta_183_u	Unstable	¹⁸³Ta	Boson	73	p	110	n	7/2	1	182.951'372'616'0	u	~ 0	%	~ 0	-45.296'117'000'0	MeV	8.006'753'000'0	MeV	2.360'000'000'0	nm	-		1.39E-2	year	439.776	kilo-seconds ( x³ )	100.000'000	%	β-	1,070.910	keV	¹⁸³W	¹⁸³Ta > [ 100 % , β- , 1,070.91 keV ] > ¹⁸³W													?	%	¹⁷⁹Hf
Isotope_073_ta_184_u	Unstable	¹⁸⁴Ta	Fermion	73	p	111	n	5	-1	183.954'007'966'0	u	~ 0	%	~ 0	-42.841'304'000'0	MeV	7.993'763'000'0	MeV	-		-		9.82E-4	year	30.996	kilo-seconds ( x³ )	100.000'000	%	β-	2,866.000	keV	¹⁸⁴W	¹⁸⁴Ta > [ 100 % , β- , 2,866.0 keV ] > ¹⁸⁴W													?	%	¹⁸⁰Hf
Isotope_073_ta_185_u	Unstable	¹⁸⁵Ta	Boson	73	p	112	n	7/2	1	184.955'559'375'0	u	~ 0	%	~ 0	-41.396'176'000'0	MeV	7.986'370'000'0	MeV	-		-		9.38E-5	year	2.960	kilo-seconds ( x³ )	100.000'000	%	β-	1,993.500	keV	¹⁸⁵W	¹⁸⁵Ta > [ 100 % , β- , 1,993.5 keV ] > ¹⁸⁵W													100.000'000	%	¹⁸⁵Re
Isotope_073_ta_186_u	Unstable	¹⁸⁶Ta	Fermion	73	p	113	n	?	0	185.958'552'023'0	u	~ 0	%	~ 0	-38.608'542'000'0	MeV	7.971'840'000'0	MeV	-		-		2.00E-5	year	630.000	seconds ( x⁰ )	100.000'000	%	β-	3,901.000	keV	¹⁸⁶W	¹⁸⁶Ta > [ 100 % , β- , 3,901.0 keV ] > ¹⁸⁶W													?	%	¹⁷⁸Hf
Isotope_073_ta_187_u	Unstable	¹⁸⁷Ta	Boson	73	p	114	n	7/2	1	186.960'530'000'0	u	~ 0	%	~ 0	-36.766'000'000'0	MeV	7.963'000'000'0	MeV	-		-		3.18E-6	year	100.200	seconds ( x⁰ )	?	%	β-	3,139.000	keV	¹⁸⁷W	¹⁸⁷Ta > [ ? % , β- , 3,139.0 keV ] > ¹⁸⁷W													?	%	¹⁸⁷Os	?	%	¹⁷⁹Hf
Isotope_073_ta_188_u	Unstable	¹⁸⁸Ta	Fermion	73	p	115	n	?	0	187.963'700'000'0	u	~ 0	%	~ 0	-33.813'000'000'0	MeV	7.947'000'000'0	MeV	-		-		6.34E-7	year	20.000	seconds ( x⁰ )	?	%	β-	4,854.000	keV	¹⁸⁸W	¹⁸⁸Ta > [ ? % , β- , 4,854.0 keV ] > ¹⁸⁸W													?	%	¹⁸⁸Os
Isotope_073_ta_189_u	Unstable	¹⁸⁹Ta	Boson	73	p	116	n	7/2	1	188.965'830'000'0	u	~ 0	%	~ 0	-31.829'000'000'0	MeV	7.938'000'000'0	MeV	-		-		9.51E-8	year	3.000	seconds ( x⁰ )	?	%	β-	3,649.000	keV	¹⁸⁹W	¹⁸⁹Ta > [ ? % , β- , 3,649.0 keV ] > ¹⁸⁹W													?	%	¹⁸⁹Os
Isotope_073_ta_190_u	Unstable	¹⁹⁰Ta	Fermion	73	p	117	n	?	0	189.969'230'000'0	u	~ 0	%	~ 0	-28.662'000'000'0	MeV	7.922'000'000'0	MeV	-		-		9.51E-9	year	300.000	milli-seconds ( x⁻³ )	?	%	β-	5,634.000	keV	¹⁹⁰W	¹⁹⁰Ta > [ ? % , β- , 5,634.0 keV ] > ¹⁹⁰W													?	%	¹⁹⁰Os

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