Barium (Hon-ngî: 鋇 bèi) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Ba, ngièn-chṳ́ su-muk he 56.
Barium, 56Bangoi-kôn |
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silvery gray; with a pale yellow tint[1]
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Kî-pún sin-sit |
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Miàng, fù-ho |
Barium, Ba |
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ngoi-hìn |
silvery gray; with a pale yellow tint[1] |
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Barium chhai chû-khì-péu ke vi-chi |
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|
ngièn-chṳ́ sì-sú |
56 |
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ngièn-chṳ́-liòng (±) |
137.327(7)[2] |
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ngièn-su lui-phe̍t |
kán-thú kîm-su̍k |
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Chhu̍k, fûn-khî |
2 chhu̍k, s-block |
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chû-khì |
period 6 |
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thien-chṳ́ phài-lie̍t |
[Xe] 6s2 |
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per shell |
2, 8, 18, 18, 8, 2 |
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vu̍t-lî sin-chṳt |
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Siông |
ku-thí |
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yùng-tiám |
1000 K (727 °C, 1341 °F) |
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pui-tiám |
2118 K (1845 °C, 3353 °F) |
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Me̍t-thu near Sit-vûn |
3.51 g·cm−3 |
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3.338 g·cm−3 |
Yùng-fa-ngie̍t |
7.12 kJ·mol−1 |
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Chîn-fat-ngie̍t |
142 kJ·mol−1 |
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Ngie̍t-yùng-liong |
28.07 J·mol−1·K−1 |
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chîn-hi-ap
P (Pa)
|
1
|
10
|
100
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1 k
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10 k
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100 k
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chhai T (K)
|
911
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1038
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1185
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1388
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1686
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2170
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Ngièn-chṳ́ sin-chṳt |
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Yông-fa-su |
+2, +1 (a strongly basic oxide) |
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Thien-fu-sin |
Pauling scale: 0.89 |
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Thien-lì-nèn |
1st: 502.9 kJ·mol−1 2nd: 965.2 kJ·mol−1 3rd: 3600 kJ·mol−1 |
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Ngièn-chṳ́ pan-kang |
empirical: 222 pm |
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Khiung-ka pan-kang |
215±11 pm |
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Van der Waals pan-kang |
268 pm |
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Miscellanea |
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Chîn-thí keu-chho |
body-centered cubic (bcc) |
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Sâng-suk thin rod |
1620 m·s−1 (at 20 °C) |
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Ngie̍t-phàng-chong |
20.6 µm·m−1·K−1 (at 25 °C) |
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Ngie̍t-chhòn-thô-li̍t |
18.4 W·m−1·K−1 |
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Thien-chú-li̍t |
332 nΩ·m (at 20 °C) |
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Chhṳ̀-sin |
paramagnetic[3] |
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Young's modulus |
13 GPa |
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Shear modulus |
4.9 GPa |
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Bulk modulus |
9.6 GPa |
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Mohs hardness |
1.25 |
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CAS Registry Number |
7440-39-3 |
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Le̍k-sú |
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Fat-hien |
Carl Wilhelm Scheele (1772) |
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First isolation |
Humphry Davy (1808) |
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Chui vún-thin ke thùng-vi-su |
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Chú vùn-chông: Barium ke thùng-vi-su |
iso
|
NA
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half-life
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DM
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DE (MeV)
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DP
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130Ba
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0.106%
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(0.5–2.7)×1021 y
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εε
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2.620
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130Xe
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132Ba
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0.101%
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>3×1020 y
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(β+β+)
|
0.846
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132Xe
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133Ba
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syn
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10.51 y
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ε
|
0.517
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133Cs
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134Ba
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2.417%
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–
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(SF)
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<40.520
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135Ba
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6.592%
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–
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(SF)
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<39.357
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136Ba
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7.854%
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–
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(SF)
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<38.041
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137Ba
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11.23%
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–
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(SF)
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<35.722
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138Ba
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71.7%
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–
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(SF)
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<34.302
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Decay modes in parentheses are predicted, but have not yet been observed |