Niobium, 41Nb| ngoi-kôn |
|---|
gray metallic, bluish when oxidized
 |
| Kî-pún sin-sit |
|---|
| Miàng, fù-ho |
Niobium, Nb |
|---|
| ngoi-hìn |
gray metallic, bluish when oxidized |
|---|
| Niobium chhai chû-khì-péu ke vi-chi |
|---|
|
|
| ngièn-chṳ́ sì-sú |
41 |
|---|
| ngièn-chṳ́-liòng (±) |
92.90637(2)[1] |
|---|
| ngièn-su lui-phe̍t |
ko-thu kîm-su̍k |
|---|
| Chhu̍k, fûn-khî |
5 chhu̍k, d-block |
|---|
| chû-khì |
period 5 |
|---|
| thien-chṳ́ phài-lie̍t |
[Kr] 4d4 5s1 |
|---|
| per shell |
2, 8, 18, 12, 1 |
|---|
| vu̍t-lî sin-chṳt |
|---|
| Siông |
ku-thí |
|---|
| yùng-tiám |
2750 K (2477 °C, 4491 °F) |
|---|
| pui-tiám |
5017 K (4744 °C, 8571 °F) |
|---|
| Me̍t-thu near Sit-vûn |
8.57 g·cm−3 |
|---|
| Yùng-fa-ngie̍t |
30 kJ·mol−1 |
|---|
| Chîn-fat-ngie̍t |
689.9 kJ·mol−1 |
|---|
| Ngie̍t-yùng-liong |
24.60 J·mol−1·K−1 |
|---|
chîn-hi-ap
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| chhai T (K) |
2942 |
3207 |
3524 |
3910 |
4393 |
5013 |
|
| Ngièn-chṳ́ sin-chṳt |
|---|
| Yông-fa-su |
5, 4, 3, 2, 1, −1, −3 (a mildly acidic oxide) |
|---|
| Thien-fu-sin |
Pauling scale: 1.6 |
|---|
| Thien-lì-nèn |
1st: 652.1 kJ·mol−1
2nd: 1380 kJ·mol−1
3rd: 2416 kJ·mol−1 |
|---|
| Ngièn-chṳ́ pan-kang |
empirical: 146 pm |
|---|
| Khiung-ka pan-kang |
164±6 pm |
|---|
| Miscellanea |
|---|
| Chîn-thí keu-chho |
body-centered cubic (bcc) |
|---|
| Sâng-suk thin rod |
3480 m·s−1 (at 20 °C) |
|---|
| Ngie̍t-phàng-chong |
7.3 µm·m−1·K−1 |
|---|
| Ngie̍t-chhòn-thô-li̍t |
53.7 W·m−1·K−1 |
|---|
| Thien-chú-li̍t |
152 nΩ·m (at 0 °C) |
|---|
| Chhṳ̀-sin |
paramagnetic |
|---|
| Young's modulus |
105 GPa |
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| Shear modulus |
38 GPa |
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| Bulk modulus |
170 GPa |
|---|
| Poisson ratio |
0.40 |
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| Mohs hardness |
6.0 |
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| Vickers hardness |
870–1320 MPa |
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| Brinell hardness |
735–2450 MPa |
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| CAS Registry Number |
7440-03-1 |
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| Le̍k-sú |
|---|
| Hí-miàng |
after Niobe in Greek mythology, daughter of Tantalus (tantalum) |
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| Fat-hien |
Charles Hatchett (1801) |
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| First isolation |
Christian Wilhelm Blomstrand (1864) |
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| Recognized as a distinct element by |
Heinrich Rose (1844) |
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| Chui vún-thin ke thùng-vi-su |
|---|
|
Chú vùn-chông: Niobium ke thùng-vi-su |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
| 90Nb |
syn |
14.6 h |
β+ |
– |
90Zr |
| 91Nb |
syn |
680 y |
ε |
– |
91Zr |
| 91mNb |
syn |
60.86 d |
IT |
0.104e |
91Nb |
| 92m1Nb |
syn |
10.15 d |
ε |
– |
92Zr |
| γ |
0.934 |
– |
| 92Nb |
syn |
3.47×107 y |
ε |
– |
92Zr |
| γ |
0.561, 0.934 |
– |
| 93Nb |
100% |
– |
(SF) |
<0.943 |
|
| 93mNb |
syn |
16.13 y |
IT |
0.031e |
93Nb |
| 94Nb |
syn |
20300 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 |
| 96Nb |
syn |
23.4 h |
β− |
– |
96Mo |
|
|
Decay modes in parentheses are predicted, but have not yet been observed |
Niobium (Hon-ngî: 鈮 ní) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Nb, ngièn-chṳ́ su-muk he 41.
