Niobium Element (Periodic Table)

Niobium

Niobium (Nb) is a chemical element of the periodic table, located in the group 5 and the period 5, and is having the atomic number 41. It is a ductile, silvery-white transition metal, which is named after Niobe, the daughter of king Tantalus in Greek mythology.

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 Niobium Element

Niobium
‣ What does niobium look like?

Appearance: grey metallic, bluish when oxidized
‣ Who discovered niobium? When was the element niobium discovered?

Discovery: Charles Hatchett (1801)
First isolation: Christian Wilhelm Blomstrand (1864)
Recognized as a distinct element by: Heinrich Rose (1844)
‣ Where is niobium found on the periodic table?

Niobium Periodic Table

Location: Niobium is found in the fifth column of the periodic table, next to the zirconium element.
‣ What is the atomic mass number of niobium?

Atomic number (Z): 41
‣ What is niobium’s symbol?

Symbol: Nb
Niobium atomic weight: 92.90637
‣ What block is niobium in the periodic table?

Block: d-block
‣ What group or family is niobium in?

Group: 5
‣ Period of niobium in the periodic table

Period: 5
Niobium atomic radius: empirical: 146 pm
Niobium covalent radius: 164±6 pm
‣ What is niobium melting point?

Melting point: 2750 K (2477 °C, 4491 °F)
‣ What is the boiling point of niobium?

Boiling point: 5017 K (4744 °C, 8571 °F)
‣ How many shells does niobium have?

Electrons per shell: 2, 8, 18, 12, 1
‣ What is the electron configuration of niobium?

Electron configuration: [Kr] 4d4 5s1
Niobium ionization energies:
1st: 652.1 kJ/mol
2nd: 1380 kJ/mol
3rd: 2416 kJ/mol
‣ What is the phase of niobium?

Phase (at r.t): solid
Niobium density (near r.t): 8.57 g/cm3
Niobium magnetic ordering: paramagnetic
Niobium natural occurrence: primordial
Niobium oxidation state: +2, +3, +4, +5
‣ What’s the electronegativity of niobium?

Electronegativity: Pauling scale: 1.6
Niobium poisson’s ratio: 0.40
Niobium heat of fusion: 30 kJ/mol
Niobium heat of vaporization: 689.9 kJ/mol
Niobium molar heat capacity: 24.60 J/(mol K)
Speed of sound in niobium: 3480 m/s (at 20 °C)
Niobium crystal structure: body-centered cubic (bcc)
Thermal expansion of niobium: 7.3 µm/(m.K)
Thermal conductivity of niobium: 53.7 W/(m.K)
Niobium electrical resistivity: 152 nΩ.m (at 20 °C)
‣ Niobium hardness

Mohs hardness: 6.0
Vickers hardness: 870-1320 MPa
Brinell hardness: 735-2450 MPa
Young’s modulus of niobium: 105 GPa
Shear modulus of niobium: 38 GPa
Bulk modulus of niobium: 170 GPa
Niobium CAS number: 7440-03-1

‣ Niobium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)294232073524391043935013

‣ How many isotopes does niobium have?

Main isotopes of niobium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
90Nbsyn15 hβ+90Zr
91Nbsyn680 yε91Zr
91Nbsyn61 dIT91Nb
92Nbtrace3.47 × 107 yε
γ
92Zr
92Nbsyn10 dε
γ
92Zr
93Nb100 %stable
93Nbsyn16 yIT93Nb
94Nbtrace20.3 × 103 yβ
γ
94Mo
95Nbsyn35 dβ
γ
95Mo
95Nbsyn4 dIT95Nb
96Nbsyn24 hβ96Mo

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