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Palladium |
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Pípè | /pəˈleɪdiəm/ (pə-LAY-dee-əm) |
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Ìhànsójú | silvery white metallic |
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Ìwúwo átọ̀mù Ar, std(Pd) | 106.42(1)[1] |
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Palladium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 46 |
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Ẹgbẹ́ | group 10 |
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Àyè | àyè 5 |
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Àdìpọ̀ | Àdìpọ̀-d |
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Ẹ̀ka ẹ́límẹ́ntì | Transition metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Kr] 4d10 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 18 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1828.05 K (1554.9 °C, 2830.82 °F) |
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Ígbà ìhó | 3236 K (2963 °C, 5365 °F) |
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Kíki (near r.t.) | 12.023 g/cm3 |
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when liquid (at m.p.) | 10.38 g/cm3 |
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Heat of fusion | 16.74 kJ/mol |
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Heat of | 362 kJ/mol |
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Molar heat capacity | 25.98 J/(mol·K) |
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pressure
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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at T (K)
|
1721
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1897
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2117
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2395
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2753
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3234
|
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Atomic properties |
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Oxidation states | 0, +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 2.20 |
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Atomic radius | empirical: 137 pm |
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Covalent radius | 139±6 pm |
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Van der Waals radius | 163 pm |
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Spectral lines of palladium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | (fcc) |
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Speed of sound thin rod | 3070 m/s (at 20 °C) |
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Thermal expansion | 11.8 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 71.8 W/(m·K) |
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Electrical resistivity | 105.4 n Ω·m (at 20 °C) |
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Magnetic ordering | paramagnetic[2] |
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Young's modulus | 121 GPa |
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Shear modulus | 44 GPa |
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Bulk modulus | 180 GPa |
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Poisson ratio | 0.39 |
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Mohs hardness | 4.75 |
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Vickers hardness | 461 MPa |
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Brinell hardness | 37.3 MPa |
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CAS Number | 7440-05-3 |
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Main isotopes of palladium |
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Àdàkọ:Category-inline | references |