Kadmium (pípè /ˈkædmiəm/, KAD-mee-əm) je ipilese elegbogi pelu ami-idamo Cd ati nomba atomu 48.
Cadmium, 48Cd |
| 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 | 745 | 867 | 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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 Color lines in a spectral rangeSpectral 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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| Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
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| 106Cd | 1.25% | >9.5×1017 y | εε2ν | - | 106Pd | | 107Cd | syn | 6.5 h | ε | 1.417 | 107Ag | | 108Cd | 0.89% | >6.7×1017 y | εε2ν | - | 108Pd | | 109Cd | syn | 462.6 d | ε | 0.214 | 109Ag | | 110Cd | 12.49% | 110Cd is stable with 62 neutrons | | 111Cd | 12.8% | 111Cd is stable with 63 neutrons | | 112Cd | 24.13% | 112Cd is stable with 64 neutrons | | 113Cd | 12.22% | 7.7×1015 y | β− | 0.316 | 113In | | 113mCd | syn | 14.1 y | β− | 0.580 | 113In | | IT | 0.264 | 113Cd | | 114Cd | 28.73% | >9.3×1017 y | ββ2ν | - | 114Sn | | 115Cd | syn | 53.46 h | β− | 1.446 | 115In | | 116Cd | 7.49% | 2.9×1019 y | ββ2ν | - | 116Sn |
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