Europium

Europium,  ₆₃Eu

ngoi-kôn
silvery white, with a pale yellow tint; but rarely seen without oxide discoloration
Kî-pún sin-sit
Miàng, fù-ho	Europium, Eu
ngoi-hìn	silvery white, with a pale yellow tint; but rarely seen without oxide discoloration
Europium chhai chû-khì-péu ke vi-chi
– ↑ Eu ↓ Am samarium ← Europium → gadolinium
ngièn-chṳ́ sì-sú	63
ngièn-chṳ́-liòng (±)	151.964(1)
ngièn-su lui-phe̍t	lanthanum-hi
Chhu̍k, fûn-khî	n/a, f-block
chû-khì	period 6
thien-chṳ́ phài-lie̍t	[Xe] 4f7 6s2
per shell	2, 8, 18, 25, 8, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	1099 K ​(826 °C, ​1519 °F)
pui-tiám	1802 K ​(1529 °C, ​2784 °F)
Me̍t-thu near Sit-vûn	5.264 g·cm−3
5.13 g·cm−3
Yùng-fa-ngie̍t	9.21 kJ·mol−1
Chîn-fat-ngie̍t	176 kJ·mol−1
Ngie̍t-yùng-liong	27.66 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 863 957 1072 1234 1452 1796
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	3, 2, 1 ​(a mildly basic oxide)
Thien-fu-sin	Pauling scale: 1.2
Thien-lì-nèn	1st: 547.1 kJ·mol−1 2nd: 1085 kJ·mol−1 3rd: 2404 kJ·mol−1
Ngièn-chṳ́ pan-kang	empirical: 180 pm
Khiung-ka pan-kang	198±6 pm
Miscellanea
Chîn-thí keu-chho	​body-centered cubic (bcc)
Ngie̍t-phàng-chong	poly: 35.0 µm·m−1·K−1 (at r.t.)
Ngie̍t-chhòn-thô-li̍t	est. 13.9 W·m−1·K−1
Thien-chú-li̍t	poly: 0.900 µΩ·m (at r.t.)
Chhṳ̀-sin	paramagnetic
Young's modulus	18.2 GPa
Shear modulus	7.9 GPa
Bulk modulus	8.3 GPa
Poisson ratio	0.152
Vickers hardness	165–200 MPa
CAS Registry Number	7440-53-1
Le̍k-sú
Hí-miàng	after Europe
Hoat-kiàn kap siōng chá ê tông-ūi-sò͘	Eugène-Anatole Demarçay (1896, 1901)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Europium ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 150Eu syn 36.9 y ε 2.261 150Sm 151Eu 47.8% 5×1018 y α 1.9644 147Pm 152Eu syn 13.54 y ε 1.874 152Sm β− 1.819 152Gd 153Eu 52.2% – (α) 0.2736 149Pm 154Eu syn 8.59 y β− 1.969 154Gd 155Eu syn 4.76 y β− 0.253 155Gd
Decay modes in parentheses are predicted, but have not yet been observed

Europium (Hon-ngî: 銪 yǒu) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Eu, ngièn-chṳ́ su-muk he 63.