Tantalum (Ta)

chemical element with the atomic number of 73

Atomic Number	73
Atomic Weight	180.94788
mass number	181

Group	5
Period	6
Block	d

proton	73 p⁺
neutron	108 n⁰
electron	73 e^-

Physical Property

Atomic Radius	145 pm 258 pm
molar volume	10.9 cm³/mol
Covalent Radius	146 pm 126 pm 119 pm 170 pm
Metallic Radius	134 pm 146 pm
ionic radius	72 pm 68 pm 64 pm 69 pm 74 pm
Crystal Radius	86 pm 82 pm 78 pm 83 pm 88 pm
Van der Waals radius	220 pm 222 pm 243 pm 317 pm
density	16.4 g/cm³ 15000 kg/m³

Chemical Property

{ERROR}

energia

proton affinity
electron affinity	0.322 eV/particle
ionization energy	7.54957 eV/particle 16.2 eV/particle 23.1 eV/particle 35 eV/particle 48.272 eV/particle 94.011 eV/particle 119 eV/particle 139 eV/particle 159 eV/particle 180 eV/particle 213 eV/particle 235 eV/particle 262 eV/particle 304 eV/particle 338 eV/particle 363 eV/particle 396 eV/particle 439 eV/particle 482 eV/particle 530 eV/particle 570 eV/particle 620 eV/particle 660 eV/particle 700 eV/particle 740 eV/particle 790 eV/particle 832 eV/particle 1064 eV/particle 1110 eV/particle 1160 eV/particle 1211 eV/particle 1262 eV/particle 1313 eV/particle 1382 eV/particle 1434 eV/particle 1490 eV/particle 1542 eV/particle 1748 eV/particle 1799 eV/particle 1857 eV/particle 1910 eV/particle 2053 eV/particle 2113 eV/particle 2254 eV/particle 2314.7 eV/particle 3898.7 eV/particle 4014 eV/particle 4143 eV/particle 4278 eV/particle 4410 eV/particle 4537 eV/particle 4745 eV/particle 4877 eV/particle 5024 eV/particle 5159 eV/particle 5537 eV/particle 5655 eV/particle 5785 eV/particle 5907 eV/particle 6364 eV/particle 6502 eV/particle 6769 eV/particle 6900 eV/particle 15137 eV/particle 15461 eV/particle 15820 eV/particle 16150 eV/particle 17840 eV/particle 18250 eV/particle 18760 eV/particle 19088.51 eV/particle 76852.02 eV/particle 78394.7 eV/particle

enthalpy of vaporization	758 kJ/mol
enthalpy of fusion	24.7 kJ/mol
standard enthalpy of formation	782 kJ/mol
electron

Tegimen electronicum	2, 8, 18, 32, 11, 2

valence electron	2 ⓘ

electron configuration	[Xe] 4f¹⁴ 5d³ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d³ 6s²

oxidation number	-3, -1, 0, 1, 2, 3, 4, 5
electronegativity	7.93 eV/particle 0.234581 1.5
Electrophilicity Index	1.0716190618855992 eV/particle
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point	5728.15 K
Melting Point	3290.15 K
critical pressure
critical temperature
Punctum triplex
appearance
Color	Black #ff1493 #4da6ff #4da6ff
appearance	gray blue
refractive index
thermodynamic material property
Thermal Conductivity	57.5 W/(m K)
thermal expansion	0.0000063 1/K
molar heat capacity	25.36 J/(mol K)
Specific Heat Capacity	0.14 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	7.7 MS/m
electrical resistivity	0.00000013 Ω*m
Superconductrum	4.47 K
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000107 m³/Kg
magnetic susceptibility (Molar)	0.000000001936 m³/mol
magnetic susceptibility (Volume)	0.0001782
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant	3.31 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
hardness	800 MPa 6.5 MPa 873 MPa
bulk modulus	200 GPa
shear modulus	69 GPa
Young's modulus	186 GPa
Poisson's ratio	0.34
celeritas soni	3400 m/s
classificare
Category	Actinides, Transition metals
CAS Group	VA
IUPAC Group	VB
Glawe Number	52
Mendeleev Number	49
Pettifor Number	53
Geochemical Class	high field strength
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	74 ± 20 a₀
C6 Dispersion Coefficient	887 a₀
allotrope
Neutron cross section	20.5
Neutron Mass Absorption	0.0041
quantum number	4F3/2
space group	229 (Im_3m)

Isotopes of Tantalum

Stable Isotopes	1
Unstable Isotopes	39
Natural Isotopes	1

¹⁵⁵Ta

mass number	155
neutron number	82
Relative Atomic Mass	154.974248 ± 0.000322 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	3.2 ± 1.3 ms
Volubilitas	11/2
nuclear quadrupole moment
repertus	2007
parity	-

decay mode	intensity
p (proton emission)	100%

¹⁵⁶Ta

mass number	156
neutron number	83
Relative Atomic Mass	155.972087 ± 0.000322 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	106 ± 4 ms
Volubilitas	2
nuclear quadrupole moment
repertus	1992
parity	-

decay mode	intensity
p (proton emission)	71%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	29%

¹⁵⁷Ta

mass number	157
neutron number	84
Relative Atomic Mass	156.968227445 ± 0.000161087 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	10.1 ± 0.4 ms
Volubilitas	1/2
nuclear quadrupole moment	0
repertus	1979
parity	+

decay mode	intensity
α (α emission)	96.6%
p (proton emission)	3.4%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁵⁸Ta

mass number	158
neutron number	85
Relative Atomic Mass	157.966593 ± 0.000215 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	49 ± 4 ms
Volubilitas	2
nuclear quadrupole moment
repertus	1979
parity

decay mode	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁵⁹Ta

mass number	159
neutron number	86
Relative Atomic Mass	158.963028046 ± 0.000021137 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.04 ± 0.09 s
Volubilitas	1/2
nuclear quadrupole moment	0
repertus	1979
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	66%
α (α emission)	34%

¹⁶⁰Ta

mass number	160
neutron number	87
Relative Atomic Mass	159.961541678 ± 0.00005831 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.7 ± 0.2 s
Volubilitas	2
nuclear quadrupole moment
repertus	1979
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

¹⁶¹Ta

mass number	161
neutron number	88
Relative Atomic Mass	160.958369489 ± 0.000026174 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	1/2
nuclear quadrupole moment	0
repertus	1979
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

¹⁶²Ta

mass number	162
neutron number	89
Relative Atomic Mass	161.957292907 ± 0.000067979 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	3.57 ± 0.12 s
Volubilitas	3
nuclear quadrupole moment
repertus	1985
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.926%
α (α emission)	0.074%

¹⁶³Ta

mass number	163
neutron number	90
Relative Atomic Mass	162.954337194 ± 0.00004086 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	10.6 ± 1.8 s
Volubilitas	1/2
nuclear quadrupole moment	0
repertus	1985
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

¹⁶⁴Ta

mass number	164
neutron number	91
Relative Atomic Mass	163.953534 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	14.2 ± 0.3 s
Volubilitas	3
nuclear quadrupole moment
repertus	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁵Ta

mass number	165
neutron number	92
Relative Atomic Mass	164.950780287 ± 0.000014571 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	31 ± 1.5 s
Volubilitas	1/2
nuclear quadrupole moment	0
repertus	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁶Ta

mass number	166
neutron number	93
Relative Atomic Mass	165.950512 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	34.4 ± 0.5 s
Volubilitas	2
nuclear quadrupole moment
repertus	1977
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁷Ta

mass number	167
neutron number	94
Relative Atomic Mass	166.948093 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.33 ± 0.07 m
Volubilitas	3/2
nuclear quadrupole moment
repertus	1982
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁸Ta

mass number	168
neutron number	95
Relative Atomic Mass	167.948047 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	2 ± 0.1 m
Volubilitas	3
nuclear quadrupole moment
repertus	1969
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁹Ta

mass number	169
neutron number	96
Relative Atomic Mass	168.946011 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	4.9 ± 0.4 m
Volubilitas	5/2
nuclear quadrupole moment
repertus	1969
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁰Ta

mass number	170
neutron number	97
Relative Atomic Mass	169.946175 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	6.76 ± 0.06 m
Volubilitas	3
nuclear quadrupole moment
repertus	1969
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷¹Ta

mass number	171
neutron number	98
Relative Atomic Mass	170.944476 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	23.3 ± 0.3 m
Volubilitas	5/2
nuclear quadrupole moment
repertus	1969
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷²Ta

mass number	172
neutron number	99
Relative Atomic Mass	171.944895 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	36.8 ± 0.3 m
Volubilitas	3
nuclear quadrupole moment
repertus	1964
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷³Ta

mass number	173
neutron number	100
Relative Atomic Mass	172.94375 ± 0.00003 Da
g-factor	0.68 ± 0.012
natural abundance
radioactivitas	☢️ radioactive element
half-life	3.14 ± 0.13 h
Volubilitas	5/2
nuclear quadrupole moment	-1.8 ± 0.2
repertus	1960
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁴Ta

mass number	174
neutron number	101
Relative Atomic Mass	173.944454 ± 0.00003 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.14 ± 0.08 h
Volubilitas	3
nuclear quadrupole moment
repertus	1960
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁵Ta

mass number	175
neutron number	102
Relative Atomic Mass	174.943737 ± 0.00003 Da
g-factor	0.64857142857143 ± 0.014285714285714
natural abundance
radioactivitas	☢️ radioactive element
half-life	10.5 ± 0.2 h
Volubilitas	7/2
nuclear quadrupole moment	3.5 ± 0.3
repertus	1960
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁶Ta

mass number	176
neutron number	103
Relative Atomic Mass	175.944857 ± 0.000033 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	8.09 ± 0.05 h
Volubilitas	1
nuclear quadrupole moment
repertus	1948
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁷Ta

mass number	177
neutron number	104
Relative Atomic Mass	176.94448194 ± 0.000003558 Da
g-factor	0.64285714285714 ± 0.014285714285714
natural abundance
radioactivitas	☢️ radioactive element
half-life	56.36 ± 0.13 h
Volubilitas	7/2
nuclear quadrupole moment
repertus	1948
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁸Ta

mass number	178
neutron number	105
Relative Atomic Mass	177.94568 ± 0.000056 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	2.36 ± 0.08 h
Volubilitas	7
nuclear quadrupole moment
repertus	1950
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁹Ta

mass number	179
neutron number	106
Relative Atomic Mass	178.94593905 ± 0.000001574 Da
g-factor	0.65314285714286 ± 0.0017142857142857
natural abundance
radioactivitas	☢️ radioactive element
half-life	1.82 ± 0.03 y
Volubilitas	7/2
nuclear quadrupole moment	3.27 ± 0.04
repertus	1950
parity	+

decay mode	intensity
ϵ (electron capture)	100%

¹⁸⁰Ta

mass number	180
neutron number	107
Relative Atomic Mass	179.947467589 ± 0.000002219 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	8.154 ± 0.006 h
Volubilitas	1
nuclear quadrupole moment
repertus	1938
parity	+

decay mode	intensity
ϵ (electron capture)	85%
β⁻ (β⁻ decay)	15%

¹⁸¹Ta

mass number	181
neutron number	108
Relative Atomic Mass	180.947998528 ± 0.000001692 Da
g-factor
natural abundance	99.98799 ± 0.00032
radioactivitas	stable isotope
half-life	Not Radioactive ☢️
Volubilitas	7/2
nuclear quadrupole moment	3.17 ± 0.02
repertus	1932
parity	+

¹⁸²Ta

mass number	182
neutron number	109
Relative Atomic Mass	181.950154612 ± 0.000001693 Da
g-factor	1.0066666666667 ± 0.01
natural abundance
radioactivitas	☢️ radioactive element
half-life	114.74 ± 0.12 d
Volubilitas	3
nuclear quadrupole moment	2.6 ± 0.3
repertus	1938
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸³Ta

mass number	183
neutron number	110
Relative Atomic Mass	182.95137538 ± 0.000001707 Da
g-factor	0.67428571428571 ± 0.0085714285714286
natural abundance
radioactivitas	☢️ radioactive element
half-life	5.1 ± 0.1 d
Volubilitas	7/2
nuclear quadrupole moment
repertus	1950
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁴Ta

mass number	184
neutron number	111
Relative Atomic Mass	183.954009958 ± 0.000027923 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	8.7 ± 0.1 h
Volubilitas	5
nuclear quadrupole moment
repertus	1955
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁵Ta

mass number	185
neutron number	112
Relative Atomic Mass	184.955561317 ± 0.000015202 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	49.4 ± 1.5 m
Volubilitas	7/2
nuclear quadrupole moment
repertus	1950
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁶Ta

mass number	186
neutron number	113
Relative Atomic Mass	185.958553036 ± 0.000064425 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	10.5 ± 0.3 m
Volubilitas	3
nuclear quadrupole moment
repertus	1955
parity

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁷Ta

mass number	187
neutron number	114
Relative Atomic Mass	186.960391 ± 0.00006 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	2.3 ± 6 m
Volubilitas	7/2
nuclear quadrupole moment
repertus	1999
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁸Ta

mass number	188
neutron number	115
Relative Atomic Mass	187.963596 ± 0.000215 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	19.6 ± 2 s
Volubilitas	1
nuclear quadrupole moment
repertus	1999
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁹Ta

mass number	189
neutron number	116
Relative Atomic Mass	188.96569 ± 0.000215 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	7/2
nuclear quadrupole moment
repertus	1999
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹⁰Ta

mass number	190
neutron number	117
Relative Atomic Mass	189.969168 ± 0.000215 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	5.3 ± 0.7 s
Volubilitas	3
nuclear quadrupole moment
repertus	2009
parity

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁹¹Ta

mass number	191
neutron number	118
Relative Atomic Mass	190.97153 ± 0.000322 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	7/2
nuclear quadrupole moment
repertus	2009
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

¹⁹²Ta

mass number	192
neutron number	119
Relative Atomic Mass	191.975201 ± 0.000429 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life	2.2 ± 0.7 s
Volubilitas	2
nuclear quadrupole moment
repertus	2009
parity

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹⁹³Ta

mass number	193
neutron number	120
Relative Atomic Mass	192.97766 ± 0.000429 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas	7/2
nuclear quadrupole moment
repertus	2012
parity	+

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

¹⁹⁴Ta

mass number	194
neutron number	121
Relative Atomic Mass	193.98161 ± 0.000537 Da
g-factor
natural abundance
radioactivitas	☢️ radioactive element
half-life
Volubilitas
nuclear quadrupole moment
repertus	2012
parity

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

historia

inventor	Anders Ekeberg
location of discovery	Sweden
repertus	1802
Etymologia	From king Tantalus of Greek mythology, father of Niobe.
pronunciation	TAN-te-lem (English)

source

Abundance
Abundance in Earth's crust	2 mg/kg
natural abundance (Oceanus)	0.000002 mg/L
natural abundance (Corpus humanum)
natural abundance (Meteoroides)	0.000002 %
natural abundance (Sol)
Abundance in Universe	0.000000008 %

Nuclear Screening Constants

1	s	1.4163
2	p	4.4136
2	s	19.0702
3	d	13.5589
3	p	21.1996
3	s	21.9085
4	d	36.676
4	f	39.5296
4	p	34.2652
4	s	33.2412
5	d	56.632
5	p	52.5265
5	s	50.3065
6	s	63.475

Tantalum on ChemicalAid

Tantalum (Ta)

Physical Property

Chemical Property

other

Isotopes of Tantalum

155Ta

156Ta

157Ta

158Ta

159Ta

160Ta

161Ta

162Ta

163Ta

164Ta

165Ta

166Ta

167Ta

168Ta

169Ta

170Ta

171Ta

172Ta

173Ta

174Ta

175Ta

176Ta

177Ta

178Ta

179Ta

180Ta

181Ta

182Ta

183Ta

184Ta

185Ta

186Ta

187Ta

188Ta

189Ta

190Ta

191Ta

192Ta

193Ta

194Ta

historia

source

Nuclear Screening Constants

¹⁵⁵Ta

¹⁵⁶Ta

¹⁵⁷Ta

¹⁵⁸Ta

¹⁵⁹Ta

¹⁶⁰Ta

¹⁶¹Ta

¹⁶²Ta

¹⁶³Ta

¹⁶⁴Ta

¹⁶⁵Ta

¹⁶⁶Ta

¹⁶⁷Ta

¹⁶⁸Ta

¹⁶⁹Ta

¹⁷⁰Ta

¹⁷¹Ta

¹⁷²Ta

¹⁷³Ta

¹⁷⁴Ta

¹⁷⁵Ta

¹⁷⁶Ta

¹⁷⁷Ta

¹⁷⁸Ta

¹⁷⁹Ta

¹⁸⁰Ta

¹⁸¹Ta

¹⁸²Ta

¹⁸³Ta

¹⁸⁴Ta

¹⁸⁵Ta

¹⁸⁶Ta

¹⁸⁷Ta

¹⁸⁸Ta

¹⁸⁹Ta

¹⁹⁰Ta

¹⁹¹Ta

¹⁹²Ta

¹⁹³Ta

¹⁹⁴Ta