| Niobium
|
41Nb
|
V
↑
Nb
↓
Ta
|
|
|
|
|
zirconium ← niobium → molybdenum
|
|
| Ìhànsójú
|
gray metallic, yellowish when oxidized
|
| Àwọn ìdámọ́ wíwọ́pọ̀
|
| Orúkọ, àmì-ìdámọ́, nọ́mbà
|
niobium, Nb, 41
|
| Ẹ̀ka ẹ́límẹ̀nti
|
transition metal
|
| Ẹgbẹ́, àsìkò, àdìpò
|
5, 5, d
|
| Ìwúwo átọ́mù
|
92.90638
|
| Ìtòléra ẹ̀lẹ́ktrónì
|
[Kr] 4d4 5s1
2, 8, 18, 12, 1
|
| Physical properties
|
| Phase
|
solid
|
| Density (near r.t.)
|
8.57 g·cm−3
|
| Melting point
|
2750 K, 2477 °C, 4491 °F
|
| Boiling point
|
5017 K, 4744 °C, 8571 °F
|
| Heat of fusion
|
30 kJ·mol−1
|
| Heat of vaporization
|
689.9 kJ·mol−1
|
| Molar heat capacity
|
24.60 J·mol−1·K−1
|
| Vapor pressure
|
| P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
| at T (K)
|
2942
|
3207
|
3524
|
3910
|
4393
|
5013
|
|
| Atomic properties
|
| Oxidation states
|
5, 4, 3, 2, -1
(mildly acidic oxide)
|
| Electronegativity
|
1.6 (Pauling scale)
|
| Ionization energies
|
1st: 652.1 kJ·mol−1
|
| 2nd: 1380 kJ·mol−1
|
| 3rd: 2416 kJ·mol−1
|
| Atomic radius
|
146 pm
|
| Covalent radius
|
164±6 pm
|
| Miscellanea
|
| Crystal structure
|
cubic body-centered
|
| Magnetic ordering
|
paramagnetic
|
| Electrical resistivity
|
(0 °C) 152 nΩ·m
|
| Thermal conductivity
|
53.7 W·m−1·K−1
|
| Thermal expansion
|
7.3 µm/(m·K)
|
| Speed of sound (thin rod)
|
(20 °C) 3480 m·s−1
|
| Young's modulus
|
105 GPa
|
| Shear modulus
|
38 GPa
|
| Bulk modulus
|
170 GPa
|
| Poisson ratio
|
0.40
|
| Mohs hardness
|
6.0
|
| Vickers hardness
|
1320 MPa
|
| Brinell hardness
|
736 MPa
|
| CAS registry number
|
7440-03-1
|
| Àwọn ísótòpù dídúró jùlọ
|
| Main article: Àwọn ísótòpù niobium
|
| iso
|
NA
|
half-life
|
DM
|
DE (MeV)
|
DP
|
| 91Nb
|
syn
|
6.8×102 y
|
ε
|
-
|
91Zr
|
| 91mNb
|
syn
|
60.86 d
|
IT
|
0.104e
|
91Nb
|
| 92Nb
|
syn
|
10.15 d
|
ε
|
-
|
92Zr
|
| γ
|
0.934
|
-
|
| 92Nb
|
syn
|
3.47×107y
|
ε
|
-
|
92Zr
|
| γ
|
0.561, 0.934
|
-
|
| 93Nb
|
100%
|
93Nb is stable with 52 neutrons
|
| 93mNb
|
syn
|
16.13 y
|
IT
|
0.031e
|
93Nb
|
| 94Nb
|
syn
|
2.03×104 y
|
β−
|
0.471
|
94Mo
|
| γ
|
0.702, 0.871
|
-
|
| 95Nb
|
syn
|
34.991 d
|
β−
|
0.159
|
95Mo
|
| γ
|
0.765
|
-
|
| 95mNb
|
syn
|
3.61 d
|
IT
|
0.235
|
95Nb
|
|
| · r
|
Niobium (pípè /naɪˈoʊbiəm/ nye-OH-bee-əm) (Greek mythology: Niobe, omo birin Tantalus), tabi columbium (/kəˈlʌmbiəm/ kə-LUM-bee-əm), je ipilese elegbogi pelu ami-idamo Nb ati nomba atomu 41.
Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]
| wò • if. • at. Tábìlì ìdásìkò
|
|
|
1 |
2
|
|
3 |
4 |
5
|
6 |
7 |
8
|
9 |
10 |
11
|
12 |
13 |
14
|
15 |
16 |
17
|
18
|
| 1
|
H
|
|
He
|
| 2
|
Li
|
Be
|
|
B
|
C
|
N
|
O
|
F
|
Ne
|
| 3
|
Na
|
Mg
|
|
Al
|
Si
|
P
|
S
|
Cl
|
Ar
|
| 4
|
K
|
Ca
|
|
Sc
|
Ti
|
V
|
Cr
|
Mn
|
Fe
|
Co
|
Ni
|
Cu
|
Zn
|
Ga
|
Ge
|
As
|
Se
|
Br
|
Kr
|
| 5
|
Rb
|
Sr
|
|
Y
|
Zr
|
Nb
|
Mo
|
Tc
|
Ru
|
Rh
|
Pd
|
Ag
|
Cd
|
In
|
Sn
|
Sb
|
Te
|
I
|
Xe
|
| 6
|
Cs
|
Ba
|
La
|
Ce
|
Pr
|
Nd
|
Pm
|
Sm
|
Eu
|
Gd
|
Tb
|
Dy
|
Ho
|
Er
|
Tm
|
Yb
|
Lu
|
Hf
|
Ta
|
W
|
Re
|
Os
|
Ir
|
Pt
|
Au
|
Hg
|
Tl
|
Pb
|
Bi
|
Po
|
At
|
Rn
|
| 7
|
Fr
|
Ra
|
Ac
|
Th
|
Pa
|
U
|
Np
|
Pu
|
Am
|
Cm
|
Bk
|
Cf
|
Es
|
Fm
|
Md
|
No
|
Lr
|
Rf
|
Db
|
Sg
|
Bh
|
Hs
|
Mt
|
Ds
|
Rg
|
Cn
|
Nh
|
Fl
|
Mc
|
Lv
|
Ts
|
Og
|
|
|
| Mẹ́tàlì álkálì
|
Mẹ́tàlì alkalínì ilẹ̀
|
Lanthanide
|
Áktínídì
|
Transition metal
|
Post-transition metal
|
Mẹ́tálọ́ìdì
|
Àìjẹ́mẹ́tàlì míràn
|
Halojín
|
Ẹ̀fúùfù abíire
|
Unknown chemical properties
|
|
|
|
ratwin kie but djeel e c | 0% Liz echeoad l ns 225cup
