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, 38Srngoi-kôn |
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silvery white metallic; with a pale yellow tint[1]
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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[1] |
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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)[2] |
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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)
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1
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10
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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)
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796
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882
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990
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1139
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1345
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1646
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Ngièn-chṳ́ sin-chṳt |
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Yông-fa-su |
2, 1[3] (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
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NA
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half-life
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DM
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DE (MeV)
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DP
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82Sr
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syn
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25.36 d
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ε
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–
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82Rb
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83Sr
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syn
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1.35 d
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ε
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83Rb
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β+
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83Rb
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γ
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–
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84Sr
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0.56%
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–
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(β+β+)
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1.7867
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84Kr
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85Sr
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syn
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64.84 d
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ε
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–
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85Rb
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γ
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0.514D
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–
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86Sr
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9.86%
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86Sr is stable with 48 neutrons
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87Sr
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7.0%
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87Sr is stable with 49 neutrons
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88Sr
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82.58%
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88Sr is stable with 50 neutrons
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89Sr
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syn
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50.52 d
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ε
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1.49
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89Rb
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β−
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0.909D
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89Y
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90Sr
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trace
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28.90 y
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β−
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0.546
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90Y
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Decay modes in parentheses are predicted, but have not yet been observed |