Radium

**Radium, ₈₈Ra**
Ki-pún sèng-chit
Miâ, hû-hō	radium, Ra
Gōa-hêng	silvery white metallic
Radium tī chiu-kî-piáu lāi ê ūi-tì
	francium ← radium → actinium
Goân-chú-hoan	88
Goân-chú-liōng	(226)
Goân-sò͘ lūi-pia̍t	kiⁿ-thó͘ kim-sio̍k
Cho̍k, hun-khu	2 cho̍k, s khu
Chiu-kî	tē 7 chiu-kî
Tiān-chú pâi-lia̍t	[Rn] 7s2
per shell	2, 8, 18, 32, 18, 8, 2
Bu̍t-lí sèng-chit
Siòng	kò͘-thé
Iûⁿ-tiám	973 K (700 °C, 1292 °F) (disputed)
Hut-tiám	2010 K (1737 °C, 3159 °F)
Bi̍t-tō͘ (sek-un)	5.5 g·cm−3
Iûⁿ-hoà-jia̍t	8.5 kJ·mol−1
Cheng-hoat-jia̍t	113 kJ·mol−1
Goân-chú sèng-chit
Sng-hòa-sò͘	2 (expected to have a strongly basic oxide)
Tiān-hū-tō͘	Pauling scale: 0.9
Tiān-lī-lêng	1st: 509.3 kJ·mol−1 ; 2nd: 979.0 kJ·mol−1
Kiōng-kè pòaⁿ-kèng	221±2 pm
Van der Waals pòaⁿ-kèng	283 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	body-centered cubic (bcc)
Jia̍t-thoân-tō-lu̍t	18.6 W·m−1·K−1
Tiān-chó͘-lu̍t	1 µΩ·m (at 20 °C)
Chû-sèng	nonmagnetic
CAS teng-kì pian-hō	7440-14-4
Le̍k-sú
Hoat-hiān	Pierre Curie and Marie Curie (1898)
Siōng chá hû-lî	Marie Curie (1910)
Chòe ún-tēng ê tông-ūi-sò͘
	Chú bûn-chiong: radium ê tông-ūi-sò͘

Radium ("La-jí-ùm") sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 88, hoà-ha̍k hû-hō sī Ra.

Chham-khó[siu-kái | kái goân-sú-bé]

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