Actinium

Actinium,  ₈₉Ac

Ki-pún sèng-chit
Miâ, hû-hō	actinium, Ac
Gōa-hêng	silvery-white, glowing with an eerie blue light; sometimes with a golden cast
Actinium tī chiu-kî-piáu lāi ê ūi-tì
La ↑ Ac ↓ (Uqu) radium ← actinium → thorium
Goân-chú-hoan	89
Goân-chú-liōng	(227)
Goân-sò͘ lūi-pia̍t	actinium-hē sometimes considered a transition metal
Cho̍k, hun-khu	n/a, f khu
Chiu-kî	tē 7 chiu-kî
Tiān-chú pâi-lia̍t	[Rn] 6d1 7s2
per shell	2, 8, 18, 32, 18, 9, 2
Bu̍t-lí sèng-chit
Siòng	kò͘-thé
Iûⁿ-tiám	1500 K ​(1227 °C, ​2240 °F) (estimated)
Hut-tiám	3500±300 K ​(3200±300 °C, ​5800±500 °F) (extrapolated)
Bi̍t-tō͘  (sek-un)	10 g·cm−3
Iûⁿ-hoà-jia̍t	14 kJ·mol−1
Cheng-hoat-jia̍t	400 kJ·mol−1
Jia̍t-iông-liōng	27.2 J·mol−1·K−1
Goân-chú sèng-chit
Sng-hòa-sò͘	3, 2 ​(a neutral oxide)
Tiān-hū-tō͘	Pauling scale: 1.1
Tiān-lī-lêng	1st: 499 kJ·mol−1 2nd: 1170 kJ·mol−1
Kiōng-kè pòaⁿ-kèng	215 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​face-centered cubic (fcc)
Jia̍t-thoân-tō-lu̍t	12 W·m−1·K−1
CAS teng-kì pian-hō	7440-34-8
Le̍k-sú
Hoat-hiān kap siōng chá ê tông-ūi-sò͘	Friedrich Oskar Giesel (1902)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: actinium ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 225Ac trace 10 d α 5.935 221Fr 226Ac syn 29.37 h β− 1.117 226Th ε 0.640 226Ra α 5.536 222Fr 227Ac trace 21.772 y β− 0.045 227Th α 5.042 223Fr

Actinium ("Ak-tín-ni-ùm") sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 89, hoà-ha̍k hû-hō sī Ac.