|
|
| Ìfarahàn |
silvery gray
 |
| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
barium, Ba, 56 |
| Ẹ̀ka apilẹ̀sẹ̀ |
alkaline earth metals |
| Àdìpọ̀, ìgbà, block |
2, 6, s |
| Ìwúwo átọ́mù |
137.33 g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Xe] 6s2 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 18, 8, 2 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
3.51 g·cm−3 |
| Liquid density at m.p. |
3.338 g·cm−3 |
| ojúàmì ìyọ́ |
1000 K, 727 °C, 1341 °F |
| ajúàmì ìhó |
2170 K, 1897 °C, 3447 °F |
| Heat of fusion |
7.12 kJ·mol−1 |
| Heat of vaporization |
140.3 kJ·mol−1 |
| Specific heat capacity |
(25 °C) 28.07 J·mol−1·K−1 |
| Vapor pressure |
| P/Pa |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T/K |
911 |
1038 |
1185 |
1388 |
1686 |
2170 |
|
| Atomic properties |
| Oxidation states |
2
(strongly basic oxide) |
| Electronegativity |
0.89 (Pauling scale) |
| Ionization energies |
1st: 502.9 kJ·mol−1 |
| 2nd: 965.2 kJ·mol−1 |
| 3rd: 3600 kJ·mol−1 |
| Atomic radius |
222 pm |
| Covalent radius |
215±11 pm |
| Van der Waals radius |
268 pm |
| Miscellanea |
| Crystal structure |
body-centered cubic |
| Magnetic ordering |
paramagnetic |
| Electrical resistivity |
(20 °C) 332 nΩ·m |
| Thermal conductivity |
(300 K) 18.4 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 20.6 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 1620 m/s |
| Young's modulus |
13 GPa |
| Shear modulus |
4.9 GPa |
| Bulk modulus |
9.6 GPa |
| Mohs hardness |
1.25 |
| CAS registry number |
7440-39-3 |
| Most stable isotopes |
| Main article: Isotopes of barium |
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Barium (pípè /ˈbɛəriəm/, BAIR-ee-əm) je apilese kemika. O ni ami-idamo Ba, nomba atomu re je 56, ohun si ni apilese karun ni Adipo 2.
