Rubidium, 37Rbngoi-kôn |
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grey white
![](//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Rb5.JPG/250px-Rb5.JPG) |
Kî-pún sin-sit |
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Miàng, fù-ho |
Rubidium, Rb |
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ngoi-hìn |
grey white |
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Rubidium chhai chû-khì-péu ke vi-chi |
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ngièn-chṳ́ sì-sú |
37 |
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ngièn-chṳ́-liòng (±) |
85.4678(3)[1] |
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ngièn-su lui-phe̍t |
kán-kîm-su̍k |
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Chhu̍k, fûn-khî |
1 chhu̍k, s-block |
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chû-khì |
period 5 |
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thien-chṳ́ phài-lie̍t |
[Kr] 5s1 |
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per shell |
2, 8, 18, 8, 1 |
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vu̍t-lî sin-chṳt |
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Siông |
ku-thí |
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yùng-tiám |
312.45 K (39.30 °C, 102.74 °F) |
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pui-tiám |
961 K (688 °C, 1270 °F) |
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Me̍t-thu near Sit-vûn |
1.532 g·cm−3 |
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1.46 g·cm−3 |
Sâm-siong-tiám |
312.41 K, ? kPa[2] |
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lìm-kie-tiám |
2093 K, 16 MPa (extrapolated)[2] |
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Yùng-fa-ngie̍t |
2.19 kJ·mol−1 |
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Chîn-fat-ngie̍t |
69 kJ·mol−1 |
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Ngie̍t-yùng-liong |
31.060 J·mol−1·K−1 |
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chîn-hi-ap
P (Pa)
|
1
|
10
|
100
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1 k
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10 k
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100 k
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chhai T (K)
|
434
|
486
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552
|
641
|
769
|
958
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Ngièn-chṳ́ sin-chṳt |
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Yông-fa-su |
+1, −1 (a strongly basic oxide) |
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Thien-fu-sin |
Pauling scale: 0.82 |
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Thien-lì-nèn |
1st: 403 kJ·mol−1 2nd: 2632.1 kJ·mol−1 3rd: 3859.4 kJ·mol−1 |
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Ngièn-chṳ́ pan-kang |
empirical: 248 pm |
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Khiung-ka pan-kang |
220±9 pm |
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Van der Waals pan-kang |
303 pm |
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Miscellanea |
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Chîn-thí keu-chho |
body-centered cubic (bcc) |
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Sâng-suk thin rod |
1300 m·s−1 (at 20 °C) |
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Ngie̍t-phàng-chong |
90 µm·m−1·K−1[3] (at r.t.) |
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Ngie̍t-chhòn-thô-li̍t |
58.2 W·m−1·K−1 |
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Thien-chú-li̍t |
128 nΩ·m (at 20 °C) |
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Chhṳ̀-sin |
paramagnetic[4] |
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Young's modulus |
2.4 GPa |
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Bulk modulus |
2.5 GPa |
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Mohs hardness |
0.3 |
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Brinell hardness |
0.216 MPa |
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CAS Registry Number |
7440-17-7 |
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Le̍k-sú |
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Fat-hien |
Robert Bunsen and Gustav Kirchhoff (1861) |
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First isolation |
George de Hevesy |
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Chui vún-thin ke thùng-vi-su |
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Chú vùn-chông: Rubidium ke thùng-vi-su |
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Rubidium (Hon-ngî: 銣 lú) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Rb, ngièn-chṳ́ su-muk he 37.