Niobium

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Niobium

Niobium yakuwi sawijining unsur kimia jroning tabel périodik kang nduwèni lambang Nb lan nomer atom 41.

Golongan  1 2
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Période 
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
*
71
Lu
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
**
103
Lr
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

* Lantanida 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
** Aktinida 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
Seri Kimia saka Tabel Périodik
Logam alkali Alkali tanah Lantanida Aktinida Logam transisi
Logam Metaloid Nonlogam Halogen Gas mulia
Katerangan liyané Katrangan Umum Unsur, Ciri-ciri fisik ...
41 zirconiumniobiummolybdenum
V

Nb

Ta
Katrangan Umum Unsur
Jeneng, Lambang, Nomer atom niobium, Nb, 41
Dhèrèt kimiatransition metals
Golongan, Période, Blok 5, 5, d
Panampilangray metallic
Massa atom92.90638(2) g/mol
Konfigurasi elektron[Kr] 4d4 5s1
Cacahing èlèktron saben kulit2, 8, 18, 12, 1
Ciri-ciri fisik
Fasesolid
Massa jenis (watara suhu kamar)8.57 g/cm³
Titik lebur2750 K
(2477 °C, 4491 °F)
Titik umob5017 K
(4744 °C, 8571 °F)
Kalor peleburan30 kJ/mol
Kalor panguapan689.9 kJ/mol
Kapasitas kalor(25 °C) 24.60 J/(mol·K)
Tekanan uap
P/Pa1101001 k10 k100 k
ing T/K294232073524391043935013
Ciri-ciri atom
Struktur kristalcubic body centered
Bilangan oksidasi5, 3
(mildly acidic oxide)
Elektronegativitas1.6 (skala Pauling)
Energi ionisasi
(detil)
ke-1: 652.1 kJ/mol
ke-2: 1380 kJ/mol
ke-3: 2416 kJ/mol
Jari-jari atom145 pm
Jari-jari atom (terhitung)198 pm
Jari-jari kovalen137 pm
Lain-lain
Sifat magnetikno data

Cithakan:Elementbox eresist ohmmat0

Konduktivitas termal(300 K) 53.7 W/(m·K)
Ekspansi termal(25 °C) 7.3 µm/(m·K)
Kecepatan suara (pada wujud kawat)(20 °C) 3480 m/s
Modulus Young105 GPa
Modulus rigiditas38 GPa
Modulus ruah170 GPa
Nisbah Poisson0.40
Skala Mohs6.0
Kakerasan Vickers1320 MPa
Kekerasan Brinell736 MPa
Nomor CAS7440-03-1
Isotop
iso NA waktu paruh DM DE (MeV) DP
91mNb syn 60.86 d IT 0.104e 91Nb
91Nb syn 6.8×102 y ε - 91Zr
92Nb syn 10.15 d ε - 92Zr
γ 0.934 -
92Nb syn 3.47×107y ε - 92Zr
γ 0.561, 0.934 -
93mNb syn 16.13 y IT 0.031e 93Nb
93Nb 100% Nb stabil kanthi 52 neutron
94Nb syn 2.03×104 y β- 0.471 94Mo
γ 0.702, 0.871 -
95mNb syn 3.61 d IT 0.235 95Nb
95Nb syn 34.991 d β- 0.159 95Mo
γ 0.765 -
Referensi
Tutup


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