Strontium, 38Sr| ngoi-kôn |
|---|
silvery white metallic; with a pale yellow tint[1]
 |
| Kî-pún sin-sit |
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| Miàng, fù-ho |
Strontium, Sr |
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| ngoi-hìn |
silvery white metallic; with a pale yellow tint[2] |
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| Strontium chhai chû-khì-péu ke vi-chi |
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|
|
| ngièn-chṳ́ sì-sú |
38 |
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| ngièn-chṳ́-liòng (±) |
87.62(1)[3] |
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| ngièn-su lui-phe̍t |
kán-thú kîm-su̍k |
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| Chhu̍k, fûn-khî |
2 chhu̍k, s-block |
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| chû-khì |
period 5 |
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| thien-chṳ́ phài-lie̍t |
[Kr] 5s2 |
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| per shell |
2, 8, 18, 8, 2 |
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| vu̍t-lî sin-chṳt |
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| Siông |
ku-thí |
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| yùng-tiám |
1050 K (777 °C, 1431 °F) |
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| pui-tiám |
1650 K (1377 °C, 2511 °F) |
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| Me̍t-thu near Sit-vûn |
2.64 g·cm−3 |
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|
2.375 g·cm−3 |
| Yùng-fa-ngie̍t |
7.43 kJ·mol−1 |
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| Chîn-fat-ngie̍t |
141 kJ·mol−1 |
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| Ngie̍t-yùng-liong |
26.4 J·mol−1·K−1 |
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chîn-hi-ap
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| chhai T (K) |
796 |
882 |
990 |
1139 |
1345 |
1646 |
|
| Ngièn-chṳ́ sin-chṳt |
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| Yông-fa-su |
2, 1[4] (a strongly basic oxide) |
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| Thien-fu-sin |
Pauling scale: 0.95 |
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| Thien-lì-nèn |
1st: 549.5 kJ·mol−1
2nd: 1064.2 kJ·mol−1
3rd: 4138 kJ·mol−1 |
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| Ngièn-chṳ́ pan-kang |
empirical: 215 pm |
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| Khiung-ka pan-kang |
195±10 pm |
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| Van der Waals pan-kang |
249 pm |
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| Miscellanea |
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| Chîn-thí keu-chho |
face-centered cubic (fcc) |
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| Ngie̍t-phàng-chong |
22.5 µm·m−1·K−1 (at 25 °C) |
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| Ngie̍t-chhòn-thô-li̍t |
35.4 W·m−1·K−1 |
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| Thien-chú-li̍t |
132 nΩ·m (at 20 °C) |
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| Chhṳ̀-sin |
paramagnetic |
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| Young's modulus |
15.7 GPa |
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| Shear modulus |
6.03 GPa |
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| Poisson ratio |
0.28 |
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| Mohs hardness |
1.5 |
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| CAS Registry Number |
7440-24-6 |
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| Le̍k-sú |
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| Hí-miàng |
after the mineral strontianite, itself named after Strontian, Scotland |
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| Fat-hien |
William Cruickshank (1787) |
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| First isolation |
Humphry Davy (1808) |
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| Chui vún-thin ke thùng-vi-su |
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|
Chú vùn-chông: Strontium ke thùng-vi-su |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
| 82Sr |
syn |
25.36 d |
ε |
– |
82Rb |
| 83Sr |
syn |
1.35 d |
ε |
83Rb |
| β+ |
83Rb |
| γ |
– |
| 84Sr |
0.56% |
– |
(β+β+) |
1.7867 |
84Kr |
| 85Sr |
syn |
64.84 d |
ε |
– |
85Rb |
| γ |
0.514D |
– |
| 86Sr |
9.86% |
86Sr is stable with 48 neutrons |
| 87Sr |
7.0% |
87Sr is stable with 49 neutrons |
| 88Sr |
82.58% |
88Sr is stable with 50 neutrons |
| 89Sr |
syn |
50.52 d |
ε |
1.49 |
89Rb |
| β− |
0.909D |
89Y |
| 90Sr |
trace |
28.90 y |
β− |
0.546 |
90Y |
|
|
Decay modes in parentheses are predicted, but have not yet been observed |
Strontium (Hon-ngî: 鍶 sī) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Sr, ngièn-chṳ́ su-muk he 38.
