Tantalum

Tantalum (Ta)

chemical element with the atomic number of 73
Atomic Number73
Atomic Weight180.94788
mass number181
Group5
Period6
Blockd
proton73 p+
neutron108 n0
electron73 e-
Animated Bohr model of Ta (Tantalum)

Physical Property

Atomic Radius
145 pm
molar volume
Covalent Radius
146 pm
Metallic Radius
134 pm
ionic radius
72 pm
Crystal Radius
86 pm
Van der Waals radius
222 pm
density
16.4 g/cm³
Atomic Radii Of The Elements: Tantalum0102030405060708090100110120130140150160170180190200210220230pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energia
proton affinity
electron affinity
ionization energy
7.54957 eV/particle
ionization energy of Ta (Tantalum)
enthalpy of vaporization
758 kJ/mol
enthalpy of fusion
24.7 kJ/mol
standard enthalpy of formation
782 kJ/mol
electron
Tegimen electronicum2, 8, 18, 32, 11, 2
Bohr model: Ta (Tantalum)
valence electron2
Lewis structure: Ta (Tantalum)
electron configuration[Xe] 4f14 5d3 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f14 5d3 6s2
Enhanced Bohr model of Ta (Tantalum)
Orbital Diagram of Ta (Tantalum)
oxidation number-3, -1, 0, 1, 2, 3, 4, 5
electronegativity
1.5
Electrophilicity Index
1.0716190618855992 eV/particle
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
5728.15 K
Melting Point
3290.15 K
critical pressure
critical temperature
Punctum triplex
appearance
Color
Gray
appearancegray 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
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
7.7 MS/m
electrical resistivity
0.00000013 m Ω
Superconductrum
4.47 K
magnetism
typeparamagnetic
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 StructureBody Centered Cubic (BCC)
lattice constant
3.31 Å
Lattice Anglesπ/2, π/2, π/2
mechanical property
hardness
6.5 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
CategoryTransition metals, Transition metals
CAS GroupVA
IUPAC GroupVB
Glawe Number52
Mendeleev Number49
Pettifor Number53
Geochemical Classhigh field strength
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
74 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
20.5
Neutron Mass Absorption
0.0041
quantum number4F3/2
space group229 (Im_3m)

Isotopes of Tantalum

Stable Isotopes1
Unstable Isotopes39
Natural Isotopes1

155Ta

mass number155
neutron number82
relative atomic mass
154.974248 ± 0.000322 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
3.2 ± 1.3 ms
Volubilitas11/2
nuclear quadrupole moment
repertus2007
parity-

decay modeintensity
p (proton emission)100%

156Ta

mass number156
neutron number83
relative atomic mass
155.972087 ± 0.000322 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
106 ± 4 ms
Volubilitas2
nuclear quadrupole moment
repertus1992
parity-

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

157Ta

mass number157
neutron number84
relative atomic mass
156.968227445 ± 0.000161087 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
10.1 ± 0.4 ms
Volubilitas1/2
nuclear quadrupole moment
0
repertus1979
parity+

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

158Ta

mass number158
neutron number85
relative atomic mass
157.966593 ± 0.000215 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
49 ± 4 ms
Volubilitas2
nuclear quadrupole moment
repertus1979
parity

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

159Ta

mass number159
neutron number86
relative atomic mass
158.963028046 ± 0.000021137 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
1.04 ± 0.09 s
Volubilitas1/2
nuclear quadrupole moment
0
repertus1979
parity+

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

160Ta

mass number160
neutron number87
relative atomic mass
159.961541678 ± 0.00005831 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
1.7 ± 0.2 s
Volubilitas2
nuclear quadrupole moment
repertus1979
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

161Ta

mass number161
neutron number88
relative atomic mass
160.958369489 ± 0.000026174 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
Volubilitas1/2
nuclear quadrupole moment
0
repertus1979
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

162Ta

mass number162
neutron number89
relative atomic mass
161.957292907 ± 0.000067979 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
3.57 ± 0.12 s
Volubilitas3
nuclear quadrupole moment
repertus1985
parity-

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

163Ta

mass number163
neutron number90
relative atomic mass
162.954337194 ± 0.00004086 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
10.6 ± 1.8 s
Volubilitas1/2
nuclear quadrupole moment
0
repertus1985
parity+

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

164Ta

mass number164
neutron number91
relative atomic mass
163.953534 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
14.2 ± 0.3 s
Volubilitas3
nuclear quadrupole moment
repertus1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

165Ta

mass number165
neutron number92
relative atomic mass
164.950780287 ± 0.000014571 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
31 ± 1.5 s
Volubilitas1/2
nuclear quadrupole moment
0
repertus1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

166Ta

mass number166
neutron number93
relative atomic mass
165.950512 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
34.4 ± 0.5 s
Volubilitas2
nuclear quadrupole moment
repertus1977
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

167Ta

mass number167
neutron number94
relative atomic mass
166.948093 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
1.33 ± 0.07 m
Volubilitas3/2
nuclear quadrupole moment
repertus1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

168Ta

mass number168
neutron number95
relative atomic mass
167.948047 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
2 ± 0.1 m
Volubilitas3
nuclear quadrupole moment
repertus1969
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

169Ta

mass number169
neutron number96
relative atomic mass
168.946011 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
4.9 ± 0.4 m
Volubilitas5/2
nuclear quadrupole moment
repertus1969
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

170Ta

mass number170
neutron number97
relative atomic mass
169.946175 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
6.76 ± 0.06 m
Volubilitas3
nuclear quadrupole moment
repertus1969
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

171Ta

mass number171
neutron number98
relative atomic mass
170.944476 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
23.3 ± 0.3 m
Volubilitas5/2
nuclear quadrupole moment
repertus1969
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

172Ta

mass number172
neutron number99
relative atomic mass
171.944895 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
36.8 ± 0.3 m
Volubilitas3
nuclear quadrupole moment
repertus1964
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

173Ta

mass number173
neutron number100
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
Volubilitas5/2
nuclear quadrupole moment
-1.8 ± 0.2
repertus1960
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

174Ta

mass number174
neutron number101
relative atomic mass
173.944454 ± 0.00003 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
1.14 ± 0.08 h
Volubilitas3
nuclear quadrupole moment
repertus1960
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

175Ta

mass number175
neutron number102
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
Volubilitas7/2
nuclear quadrupole moment
3.5 ± 0.3
repertus1960
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

176Ta

mass number176
neutron number103
relative atomic mass
175.944857 ± 0.000033 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
8.09 ± 0.05 h
Volubilitas1
nuclear quadrupole moment
repertus1948
parity

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

177Ta

mass number177
neutron number104
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
Volubilitas7/2
nuclear quadrupole moment
repertus1948
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

178Ta

mass number178
neutron number105
relative atomic mass
177.94568 ± 0.000056 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
2.36 ± 0.08 h
Volubilitas7
nuclear quadrupole moment
repertus1950
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

179Ta

mass number179
neutron number106
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
Volubilitas7/2
nuclear quadrupole moment
3.27 ± 0.04
repertus1950
parity+

decay modeintensity
ϵ (electron capture)100%

180Ta

mass number180
neutron number107
relative atomic mass
179.947467589 ± 0.000002219 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
8.154 ± 0.006 h
Volubilitas1
nuclear quadrupole moment
repertus1938
parity+

decay modeintensity
ϵ (electron capture)85%
β (β decay)15%

181Ta

mass number181
neutron number108
relative atomic mass
180.947998528 ± 0.000001692 Da
g-factor
natural abundance
99.98799 ± 0.00032
radioactivitasstable isotope
half-lifeNot Radioactive ☢️
Volubilitas7/2
nuclear quadrupole moment
3.17 ± 0.02
repertus1932
parity+

182Ta

mass number182
neutron number109
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
Volubilitas3
nuclear quadrupole moment
2.6 ± 0.3
repertus1938
parity-

decay modeintensity
β (β decay)100%

183Ta

mass number183
neutron number110
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
Volubilitas7/2
nuclear quadrupole moment
repertus1950
parity+

decay modeintensity
β (β decay)100%

184Ta

mass number184
neutron number111
relative atomic mass
183.954009958 ± 0.000027923 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
8.7 ± 0.1 h
Volubilitas5
nuclear quadrupole moment
repertus1955
parity-

decay modeintensity
β (β decay)100%

185Ta

mass number185
neutron number112
relative atomic mass
184.955561317 ± 0.000015202 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
49.4 ± 1.5 m
Volubilitas7/2
nuclear quadrupole moment
repertus1950
parity+

decay modeintensity
β (β decay)100%

186Ta

mass number186
neutron number113
relative atomic mass
185.958553036 ± 0.000064425 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
10.5 ± 0.3 m
Volubilitas3
nuclear quadrupole moment
repertus1955
parity

decay modeintensity
β (β decay)100%

187Ta

mass number187
neutron number114
relative atomic mass
186.960391 ± 0.00006 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
2.3 ± 6 m
Volubilitas7/2
nuclear quadrupole moment
repertus1999
parity+

decay modeintensity
β (β decay)100%

188Ta

mass number188
neutron number115
relative atomic mass
187.963596 ± 0.000215 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
19.6 ± 2 s
Volubilitas1
nuclear quadrupole moment
repertus1999
parity-

decay modeintensity
β (β decay)100%

189Ta

mass number189
neutron number116
relative atomic mass
188.96569 ± 0.000215 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
Volubilitas7/2
nuclear quadrupole moment
repertus1999
parity+

decay modeintensity
β (β decay)100%

190Ta

mass number190
neutron number117
relative atomic mass
189.969168 ± 0.000215 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
5.3 ± 0.7 s
Volubilitas3
nuclear quadrupole moment
repertus2009
parity

decay modeintensity
β (β decay)100%

191Ta

mass number191
neutron number118
relative atomic mass
190.97153 ± 0.000322 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
Volubilitas7/2
nuclear quadrupole moment
repertus2009
parity+

decay modeintensity
β (β decay)

192Ta

mass number192
neutron number119
relative atomic mass
191.975201 ± 0.000429 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
2.2 ± 0.7 s
Volubilitas2
nuclear quadrupole moment
repertus2009
parity

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

193Ta

mass number193
neutron number120
relative atomic mass
192.97766 ± 0.000429 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
Volubilitas7/2
nuclear quadrupole moment
repertus2012
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

194Ta

mass number194
neutron number121
relative atomic mass
193.98161 ± 0.000537 Da
g-factor
natural abundance
radioactivitas☢️ radioactive element
half-life
Volubilitas
nuclear quadrupole moment
repertus2012
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Tantalum single crystal and 1cm3 cube

historia

inventorAnders Ekeberg
location of discoverySweden
repertus1802
EtymologiaFrom king Tantalus of Greek mythology, father of Niobe.
pronunciationTAN-te-lem (English)

source

Abundance
Abundance in Earth's crust
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

1s1.4163
2p4.4136
2s19.0702
3d13.5589
3p21.1996
3s21.9085
4d36.676
4f39.5296
4p34.2652
4s33.2412
5d56.632
5p52.5265
5s50.3065
6s63.475