Entrée : Béryllium
URI: https://terra-vocabulary.org/ncl/DataTerraRepositoryFairIncubator/motsClefs/c_b46b7e36
[Wikipedia] Beryllium is a chemical element with the symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally only in combination with other elements to form minerals. Notable gemstones high in beryllium include beryl (aquamarine, emerald) and chrysoberyl. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars, beryllium is depleted as it is fused into heavier elements. Beryllium constitutes about 0.0004 percent by mass of Earth's crust. The world's annual beryllium production of 220 tons is usually manufactured by extraction from the mineral beryl, a difficult process because beryllium bonds strongly to oxygen.
Métadonnées principales
| est un | feature of interest | Concept |
| modifié le | 17 Nov 2023 08:31:48.136 |
| soumis par | Hélène Bressan |
| accepté le | 22 May 2023 15:01:25.982 |
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| date accepted |
22 May 2023 15:01:25.982
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| date submitted |
22 May 2023 13:21:09.477
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| definition |
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| description |
[Wikipedia] Beryllium is a chemical element with the symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally only in combination with other elements to form minerals. Notable gemstones high in beryllium include beryl (aquamarine, emerald) and chrysoberyl. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars, beryllium is depleted as it is fused into heavier elements. Beryllium constitutes about 0.0004 percent by mass of Earth's crust. The world's annual beryllium production of 220 tons is usually manufactured by extraction from the mineral beryl, a difficult process because beryllium bonds strongly to oxygen.
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Concept
| feature of interest
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| modified |
17 Nov 2023 08:31:48.136
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| notation |
c_b46b7e36
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| register |
mots clefs
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| status |
status experimental
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| type |
register item
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| version info |
4
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Définition
| alt label |
Be
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| description |
[Wikipedia] Beryllium is a chemical element with the symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally only in combination with other elements to form minerals. Notable gemstones high in beryllium include beryl (aquamarine, emerald) and chrysoberyl. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars, beryllium is depleted as it is fused into heavier elements. Beryllium constitutes about 0.0004 percent by mass of Earth's crust. The world's annual beryllium production of 220 tons is usually manufactured by extraction from the mineral beryl, a difficult process because beryllium bonds strongly to oxygen.
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| exact match |
781
| c b46b7e36
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| in scheme |
Vocabulaire des mots clefs
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| pref label |
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| same as |
c b46b7e36
| 781
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| top concept of |
Vocabulaire des mots clefs
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| type |
feature of interest
| Concept
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| was attributed to |
Pôle THEIA
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