Strontium (Hon-ngî: 鍶 sī) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Sr, ngièn-chṳ́ su-muk he 38.
Strontium, 38Sr| ngoi-kôn |
|---|
silvery white metallic; with a pale yellow tint[1]
 |
| Kî-pún sin-sit |
|---|
| Miàng, fù-ho |
Strontium, Sr |
|---|
| ngoi-hìn |
silvery white metallic; with a pale yellow tint[1] |
|---|
| Strontium chhai chû-khì-péu ke vi-chi |
|---|
|
|
| ngièn-chṳ́ sì-sú |
38 |
|---|
| ngièn-chṳ́-liòng (±) |
87.62(1)[2] |
|---|
| ngièn-su lui-phe̍t |
kán-thú kîm-su̍k |
|---|
| Chhu̍k, fûn-khî |
2 chhu̍k, s-block |
|---|
| chû-khì |
period 5 |
|---|
| thien-chṳ́ phài-lie̍t |
[Kr] 5s2 |
|---|
| per shell |
2, 8, 18, 8, 2 |
|---|
| vu̍t-lî sin-chṳt |
|---|
| Siông |
ku-thí |
|---|
| yùng-tiám |
1050 K (777 °C, 1431 °F) |
|---|
| pui-tiám |
1650 K (1377 °C, 2511 °F) |
|---|
| Me̍t-thu near Sit-vûn |
2.64 g·cm−3 |
|---|
|
2.375 g·cm−3 |
| Yùng-fa-ngie̍t |
7.43 kJ·mol−1 |
|---|
| Chîn-fat-ngie̍t |
141 kJ·mol−1 |
|---|
| Ngie̍t-yùng-liong |
26.4 J·mol−1·K−1 |
|---|
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 |
|---|
| Yông-fa-su |
2, 1[3] (a strongly basic oxide) |
|---|
| Thien-fu-sin |
Pauling scale: 0.95 |
|---|
| Thien-lì-nèn |
1st: 549.5 kJ·mol−1
2nd: 1064.2 kJ·mol−1
3rd: 4138 kJ·mol−1 |
|---|
| Ngièn-chṳ́ pan-kang |
empirical: 215 pm |
|---|
| Khiung-ka pan-kang |
195±10 pm |
|---|
| Van der Waals pan-kang |
249 pm |
|---|
| Miscellanea |
|---|
| Chîn-thí keu-chho |
face-centered cubic (fcc) |
|---|
| Ngie̍t-phàng-chong |
22.5 µm·m−1·K−1 (at 25 °C) |
|---|
| Ngie̍t-chhòn-thô-li̍t |
35.4 W·m−1·K−1 |
|---|
| Thien-chú-li̍t |
132 nΩ·m (at 20 °C) |
|---|
| 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 |
|---|
| 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 |
|---|
|
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 |
