Tantalum Element (Periodic Table)

Tantalum

Tantalum (Ta) is a chemical element of the periodic table, located in the group 5 and the period 6, and has the atomic number 73. It is a hard, rare, shiny, silvery-grey transition metal, which is named after Tantalus, a Greek mythological character.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6
55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
– d block

FAQs on Tantalum Element

Tantalum
‣ What does tantalum look like?

Appearance: grey blue
‣ Who discovered tantalum? When was tantalum discovered?

Discovery: Andreas Gustaf Ekeberg (1802)
Recognized as a distinct element by: Heinrich Rose (1844)
‣ What column is tantalum in on the periodic table?

Tantalum Periodic Table

Location: Tantalum is found in the fifth column of the periodic table, next to the hafnium element.
‣ What is tantalum’s atomic number?

Atomic number (Z): 73
‣ What is the symbol for tantalum?

Symbol: Ta
Tantalum atomic weight: 180.94788
‣ What block does tantalum belong to?

Block: d-block
‣ What group is tantalum in the periodic table?

Group: 5
‣ What period is tantalum in on the periodic table?

Period: 6
Tantalum atomic radius: empirical: 146 pm
Tantalum covalent radius: 170±8 pm
‣ What is tantalum’s melting point?

Melting point: 3290 K (3017 °C, 5463 °F)
‣ What is the boiling point of tantalum?

Boiling point: 5731 K (5458 °C, 9856 °F)
‣ How many electron shells are in tantalum?

Electrons per shell: 2, 8, 18, 32, 11, 2
‣ What is the ground-state electron configuration of tantalum (ta)?

Electron configuration: [Xe] 4f14 5d3 6s2
Tantalum ionization energies:
1st: 761 kJ/mol
2nd: 1500 kJ/mol
‣ What is the normal phase of tantalum?

Phase (at r.t): solid
‣ What is the density of tantalum?

Density (near r.t): 16.69 g/cm3
when liquid (at m.p): 15 g/cm3
Tantalum magnetic ordering: paramagnetic
Tantalum natural occurrence: primordial
Tantalum oxidation state: +5
‣ What’s the electronegativity of tantalum?

Electronegativity: Pauling scale: 1.5
Tantalum poisson’s ratio: 0.34
Tantalum heat of fusion: 36.57 kJ/mol
Tantalum heat of vaporization: 753 kJ/mol
Tantalum molar heat capacity: 25.36 J/(mol K)
Tantalum molar magnetic susceptibility: +154.0 × 10-6 cm3/mol (293 K)
Speed of sound in tantalum: 3400 m/s (at 20 °C)
‣ What is the crystal structure of tantalum?

Crystal structure: body-centered cubic (bcc)
α-Ta
Crystal structure: tetragonal
β-Ta
Thermal expansion of tantalum: 6.3 µm/(m.K) (at 25 °C)
Thermal conductivity of tantalum: 57.5 W/(m.K)
Tantalum electrical resistivity: 131 nΩ.m (at 20 °C)
‣ What is the hardness of tantalum?

Mohs hardness: 6.5
Vickers hardness: 870-1200 MPa
Brinell hardness: 440-3430 MPa
Young’s modulus of tantalum: 186 GPa
Shear modulus of tantalum: 69 GPa
Bulk modulus of tantalum: 200 GPa
Tantalum CAS number: 7440-25-7

‣ Tantalum vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)329735973957439549395634

‣ How many isotopes does tantalum have?

Main isotopes of tantalum
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
177Tasyn56.56 hε177Hf
178Tasyn2.36 hε178Hf
179Tasyn1.82 yε179Hf
180Tasyn8.125 hε
β
180Hf
180W
180Ta0.012 %stable
181Ta99.988 %stable
182Tasyn114.43 dβ182W
183Tasyn5.1 dβ183W

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