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Cadmium |
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Pípè | /ˈkædmiəm/ (KAD-mee-əm) |
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Ìhànsójú | silvery gray metallic |
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Ìwúwo átọ̀mù Ar, std(Cd) | 112.414(4)[1] |
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Cadmium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 48 |
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Ẹgbẹ́ | group 12 |
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Àyè | àyè 5 |
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Àdìpọ̀ | Àdìpọ̀-d |
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Ẹ̀ka ẹ́límẹ́ntì | Post-transition metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Kr] 4d10 5s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 18, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 594.22 K (321.07 °C, 609.93 °F) |
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Ígbà ìhó | 1040 K (767 °C, 1413 °F) |
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Kíki (near r.t.) | 8.65 g/cm3 |
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when liquid (at m.p.) | 7.996 g/cm3 |
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Heat of fusion | 6.21 kJ/mol |
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Heat of | 99.87 kJ/mol |
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Molar heat capacity | 26.020 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
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at T (K)
|
530
|
583
|
654
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745
|
867
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1040
|
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Atomic properties |
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Oxidation states | −2, +1, +2 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.69 |
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Atomic radius | empirical: 151 pm |
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Covalent radius | 144±9 pm |
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Van der Waals radius | 158 pm |
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Spectral lines of cadmium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | hexagonal |
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Speed of sound thin rod | 2310 m/s (at 20 °C) |
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Thermal expansion | 30.8 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 96.6 W/(m·K) |
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Electrical resistivity | (22 °C) 72.7 n Ω·m |
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Magnetic ordering | diamagnetic[2] |
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Young's modulus | 50 GPa |
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Shear modulus | 19 GPa |
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Bulk modulus | 42 GPa |
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Poisson ratio | 0.30 |
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Mohs hardness | 2.0 |
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Brinell hardness | 203 MPa |
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CAS Number | 7440-43-9 |
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Main isotopes of cadmium |
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Àdàkọ:Category-inline | references |