Entrée : Cadmium
URI: https://terra-vocabulary.org/ncl/DataTerraRepositoryFairIncubator/motsClefs/c_5b2232a1
[Wikipedia] Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate.
Métadonnées principales
| est un | Concept | feature of interest |
| modifié le | 17 Nov 2023 08:31:48.704 |
| soumis par | Hélène Bressan |
| accepté le | 22 May 2023 15:13:34.205 |
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| date accepted |
22 May 2023 15:13:34.205
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| date submitted |
22 May 2023 13:21:09.583
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| definition |
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| description |
[Wikipedia] Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate.
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feature of interest
| Concept
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17 Nov 2023 08:31:48.704
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| notation |
c_5b2232a1
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mots clefs
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status experimental
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register item
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4
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Définition
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Cd
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| description |
[Wikipedia] Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate.
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| exact match |
1100
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| c 5b2232a1
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| in scheme |
Vocabulaire des mots clefs
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| same as |
1100
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| c 5b2232a1
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| top concept of |
Vocabulaire des mots clefs
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Concept
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| was attributed to |
Pôle THEIA
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