Strontium

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
Kî-pún sin-sit
Miàng, fù-ho	Strontium, Sr
ngoi-hìn	silvery white metallic; with a pale yellow tint
Strontium chhai chû-khì-péu ke vi-chi
Ca ↑ Sr ↓ Ba rubidium ← Strontium → yttrium
ngièn-chṳ́ sì-sú	38
ngièn-chṳ́-liòng (±)	87.62(1)
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 ​(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
Young's modulus	15.7 GPa
Shear modulus	6.03 GPa
Poisson ratio	0.28
Mohs hardness	1.5
CAS Registry Number	7440-24-6
Le̍k-sú
Hí-miàng	after the mineral strontianite, itself named after Strontian, Scotland
Fat-hien	William Cruickshank (1787)
First isolation	Humphry Davy (1808)
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 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