Actinium

Actinium,  ₈₉Ac

ngoi-kôn
silvery-white, glowing with an eerie blue light; sometimes with a golden cast
Kî-pún sin-sit
Miàng, fù-ho	actinium, Ac
ngoi-hìn	silvery-white, glowing with an eerie blue light; sometimes with a golden cast
Actinium chhai chû-khì-péu ke vi-chi
La ↑ Ac ↓ (Uqu) radium ← actinium → thorium
ngièn-chṳ́ sì-sú	89
ngièn-chṳ́-liòng	(227)
ngièn-su lui-phe̍t	actinium-hi, sometimes considered a transition metal
Chhu̍k, fûn-khî	n/a, f-block
chû-khì	period 7
thien-chṳ́ phài-lie̍t	[Rn] 6d1 7s2
per shell	2, 8, 18, 32, 18, 9, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	1500 K ​(1227 °C, ​2240 °F) (estimated)
pui-tiám	3500±300 K ​(3200±300 °C, ​5800±500 °F) (extrapolated)
Me̍t-thu near Sit-vûn	10 g·cm−3
Yùng-fa-ngie̍t	14 kJ·mol−1
Chîn-fat-ngie̍t	400 kJ·mol−1
Ngie̍t-yùng-liong	27.2 J·mol−1·K−1
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	3, 2 ​(a neutral oxide)
Thien-fu-sin	Pauling scale: 1.1
Thien-lì-nèn	1st: 499 kJ·mol−1 2nd: 1170 kJ·mol−1
Khiung-ka pan-kang	215 pm
Miscellanea
Chîn-thí keu-chho	​face-centered cubic (fcc)
Ngie̍t-chhòn-thô-li̍t	12 W·m−1·K−1
CAS Registry Number	7440-34-8
Le̍k-sú
Hoat-kiàn kap siōng chá ê tông-ūi-sò͘	Friedrich Oskar Giesel (1902)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: actinium ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 225Ac trace 10 d α 5.935 221Fr 226Ac syn 29.37 h β− 226Th ε 226Ra α 222Fr 227Ac trace 21.772 y β− 0.045 227Th α 5.042 223Fr

Actinium (Hon-ngî: 錒 ā) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Ac, ngièn-chṳ́ su-muk he 89.