Barium

Barium sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 56, hoà-ha̍k hû-hō sī Ba.

Barium,  ₅₆Ba

Ki-pún sèng-chit
Miâ, hû-hō	barium, Ba
Gōa-hêng	silvery gray; with a pale yellow tint
Barium tī chiu-kî-piáu lāi ê ūi-tì
Sr ↑ Ba ↓ Ra caesium ← barium → lanthanum
Goân-chú-hoan	56
Goân-chú-liōng (±)	137.327(7)
Goân-sò͘ lūi-pia̍t	kiⁿ-thó͘ kim-sio̍k
Cho̍k, hun-khu	2 cho̍k, s khu
Chiu-kî	tē 6 chiu-kî
Tiān-chú pâi-lia̍t	[Xe] 6s2
per shell	2, 8, 18, 18, 8, 2
Bu̍t-lí sèng-chit
Siòng	kò͘-thé
Iûⁿ-tiám	1000 K ​(727 °C, ​1341 °F)
Hut-tiám	2118 K ​(1845 °C, ​3353 °F)
Bi̍t-tō͘  (sek-un)	3.51 g·cm−3
3.338 g·cm−3
Iûⁿ-hoà-jia̍t	7.12 kJ·mol−1
Cheng-hoat-jia̍t	142 kJ·mol−1
Jia̍t-iông-liōng	28.07 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 911 1038 1185 1388 1686 2170
Goân-chú sèng-chit
Sng-hòa-sò͘	+2, +1 ​(a strongly basic oxide)
Tiān-hū-tō͘	Pauling scale: 0.89
Tiān-lī-lêng	1st: 502.9 kJ·mol−1 2nd: 965.2 kJ·mol−1 3rd: 3600 kJ·mol−1
Goân-chú pòaⁿ-kèng	empirical: 222 pm
Kiōng-kè pòaⁿ-kèng	215±11 pm
Van der Waals pòaⁿ-kèng	268 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​body-centered cubic (bcc)
Siaⁿ-sok (sòe kùn-á)	1620 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	20.6 µm·m−1·K−1 (at 25 °C)
Jia̍t-thoân-tō-lu̍t	18.4 W·m−1·K−1
Tiān-chó͘-lu̍t	332 nΩ·m (at 20 °C)
Chû-sèng	paramagnetic
Young hē-sò͘	13 GPa
Shear hē-sò͘	4.9 GPa
Bulk hē-sò͘	9.6 GPa
Mohs ngē-tō͘	1.25
CAS teng-kì pian-hō	7440-39-3
Le̍k-sú
Hoat-hiān	Carl Wilhelm Scheele (1772)
Siōng chá hû-lî	Humphry Davy (1808)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: barium ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 130Ba 0.106% (0.5–2.7)×1021 y εε 2.620 130Xe 132Ba 0.101% >3×1020 y (β+β+) 0.846 132Xe 133Ba syn 10.51 y ε 0.517 133Cs 134Ba 2.417% – (SF) <40.520 135Ba 6.592% – (SF) <39.357 136Ba 7.854% – (SF) <38.041 137Ba 11.23% – (SF) <35.722 138Ba 71.7% – (SF) <34.302
Decay modes in parentheses are predicted, but have not yet been observed