Palladium
Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
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| Ìfarahàn |
silvery white metallic
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| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
palladium, Pd, 46 |
| Ìpè |
/pəˈleɪdiəm/
pə-LAY-dee-əm |
| Ẹ̀ka apilẹ̀sẹ̀ |
transition metal |
| Àdìpọ̀, ìgbà, block |
10, 5, d |
| Ìwúwo átọ́mù |
106.42 g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Kr] 4d10 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 18 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
12.023 g·cm−3 |
| Liquid density at m.p. |
10.38 g·cm−3 |
| ojúàmì ìyọ́ |
1828.05 K, 1554.9 °C, 2830.82 °F |
| ajúàmì ìhó |
3236 K, 2963 °C, 5365 °F |
| Heat of fusion |
16.74 kJ·mol−1 |
| Heat of vaporization |
362 kJ·mol−1 |
| Specific heat capacity |
(25 °C) 25.98 J·mol−1·K−1 |
| Vapor pressure |
| P/Pa |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T/K |
1721 |
1897 |
2117 |
2395 |
2753 |
3234 |
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| Atomic properties |
| Oxidation states |
0, +1, +2, +4, +6
(mildly basic oxide) |
| Electronegativity |
2.20 (Pauling scale) |
| Ionization energies |
1st: 804.4 kJ·mol−1 |
| 2nd: 1870 kJ·mol−1 |
| 3rd: 3177 kJ·mol−1 |
| Atomic radius |
137 pm |
| Covalent radius |
139±6 pm |
| Van der Waals radius |
163 pm |
| Miscellanea |
| Crystal structure |
face-centered cubic |
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(20 °C) 105.4 nΩ·m |
| Thermal conductivity |
(300 K) 71.8 W·m−1·K−1 |
| Thermal expansion |
(25 °C) 11.8 µm·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 3070 m/s |
| Young's modulus |
121 GPa |
| Shear modulus |
44 GPa |
| Bulk modulus |
180 GPa |
| Poisson ratio |
0.39 |
| Mohs hardness |
4.75 |
| Vickers hardness |
461 MPa |
| Brinell hardness |
37.3 MPa |
| CAS registry number |
7440-05-3 |
| Most stable isotopes |
| Main article: Isotopes of palladium |
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