Koi

Koi, ₂₀Ca
ngoi-kôn
	dull gray, silver; with a pale yellow tint; ; ; Spectral lines of calcium
Kî-pún sin-sit
Miàng, fù-ho	Koi, Ca
Yîn-ngî	calcium
ngoi-hìn	dull gray, silver; with a pale yellow tint
Koi chhai chû-khì-péu ke vi-chi
	Kap ← Koi → scandium
ngièn-chṳ́ sì-sú	20
ngièn-chṳ́-liòng (±)	40.078(4)
ngièn-su lui-phe̍t	kán-thú kîm-su̍k
Chhu̍k, fûn-khî	2 chhu̍k, s-block
chû-khì	period 4
thien-chṳ́ phài-lie̍t	[Ar] 4s2
per shell	2, 8, 8, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	1115 K (842 °C, 1548 °F)
pui-tiám	1757 K (1484 °C, 2703 °F)
Me̍t-thu near Sit-vûn	1.55 g·cm−3
	1.378 g·cm−3
Yùng-fa-ngie̍t	8.54 kJ·mol−1
Chîn-fat-ngie̍t	154.7 kJ·mol−1
Ngie̍t-yùng-liong	25.929 J·mol−1·K−1
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	+2, +1, −1 (a strongly basic oxide)
Thien-fu-sin	Pauling scale: 1.00
Thien-lì-nèn	1st: 589.8 kJ·mol−1 ; 2nd: 1145.4 kJ·mol−1 ; 3rd: 4912.4 kJ·mol−1 ; (more)
Ngièn-chṳ́ pan-kang	empirical: 197 pm
Khiung-ka pan-kang	176±10 pm
Van der Waals pan-kang	231 pm
Miscellanea
Chîn-thí keu-chho	face-centered cubic (fcc)
Sâng-suk thin rod	3810 m·s−1 (at 20 °C)
Ngie̍t-phàng-chong	22.3 µm·m−1·K−1 (at 25 °C)
Ngie̍t-chhòn-thô-li̍t	201 W·m−1·K−1
Thien-chú-li̍t	33.6 nΩ·m (at 20 °C)
Chhṳ̀-sin	diamagnetic
Young's modulus	20 GPa
Shear modulus	7.4 GPa
Bulk modulus	17 GPa
Poisson ratio	0.31
Mohs hardness	1.75
Brinell hardness	170–416 MPa
CAS Registry Number	7440-70-2
Le̍k-sú
Hoat-kiàn kap siōng chá ê tông-ūi-sò͘	Humphry Davy (1808)
Chui vún-thin ke thùng-vi-su
	Chú vùn-chông: Koi ke thùng-vi-su
	Decay modes in parentheses are predicted, but have not yet been observed

Koi (鈣) he yit-tsúng Fa-ho̍k Ngièn-su, fa-ho̍k fù-ho vì Ca, ngièn-tsṳ́ su-muk he 20, tshai Ngièn-su Tsû-khì péu chûng thi-ngi-sṳ̍p vi.

↑ 模板:Greenwood&Earnshaw
↑ Standard Atomic Weights 2013. Commission on Isotopic Abundances and Atomic Weights
↑ Krieck, Sven; Görls, Helmar; Westerhausen, Matthias (2010). "Mechanistic Elucidation of the Formation of the Inverse Ca(I) Sandwich Complex [(thf)3Ca(μ-C6H3-1,3,5-Ph3)Ca(thf)3] and Stability of Aryl-Substituted Phenylcalcium Complexes". Journal of the American Chemical Society 132 (35): 12492–12501. PMID 20718434. doi:10.1021/ja105534w.

[1] 模板:Greenwood&Earnshaw

[IUPAC-2] Standard Atomic Weights 2013. Commission on Isotopic Abundances and Atomic Weights

[West-3] Krieck, Sven; Görls, Helmar; Westerhausen, Matthias (2010). "Mechanistic Elucidation of the Formation of the Inverse Ca(I) Sandwich Complex [(thf)3Ca(μ-C6H3-1,3,5-Ph3)Ca(thf)3] and Stability of Aryl-Substituted Phenylcalcium Complexes". Journal of the American Chemical Society 132 (35): 12492–12501. PMID 20718434. doi:10.1021/ja105534w.

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