Ytterbium
Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
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| Ìfarahàn |
silvery white
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| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
ytterbium, Yb, 70 |
| Ẹ̀ka apilẹ̀sẹ̀ |
lanthanide |
| Àdìpọ̀, ìgbà, block |
n/a, 6, f |
| Ìwúwo átọ́mù |
173.04 g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Xe] 4f14 6s2 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 32, 8, 2 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
6.90 g·cm−3 |
| Liquid density at m.p. |
6.21 g·cm−3 |
| ojúàmì ìyọ́ |
1097 K, 824 °C, 1515 °F |
| ajúàmì ìhó |
1469 K, 1196 °C, 2185 °F |
| Heat of fusion |
7.66 kJ·mol−1 |
| Heat of vaporization |
159 kJ·mol−1 |
| Specific heat capacity |
(25 °C) 26.74 J·mol−1·K−1 |
| Vapor pressure |
| P/Pa |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T/K |
736 |
813 |
910 |
1047 |
(1266) |
(1465) |
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| Atomic properties |
| Oxidation states |
3, 2 (basic oxide) |
| Electronegativity |
? 1.1 (Pauling scale) |
| Ionization energies |
1st: 603.4 kJ·mol−1 |
| 2nd: 1174.8 kJ·mol−1 |
| 3rd: 2417 kJ·mol−1 |
| Atomic radius |
176 pm |
| Covalent radius |
187±8 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic |
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(r.t.) (β, poly) 0.250 µΩ·m |
| Thermal conductivity |
(300 K) 38.5 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (β, poly) 26.3 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 1590 m/s |
| Young's modulus |
(β form) 23.9 GPa |
| Shear modulus |
(β form) 9.9 GPa |
| Bulk modulus |
(β form) 30.5 GPa |
| Poisson ratio |
(β form) 0.207 |
| Vickers hardness |
206 MPa |
| Brinell hardness |
343 MPa |
| CAS registry number |
7440-64-4 |
| Most stable isotopes |
| Main article: Isotopes of ytterbium |
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