experimental
Entry: Thorium
URI: https://terra-vocabulary.org/ncl/DataTerraRepositoryFairIncubator/motsClefs/c_ec54c81f
[Wikipedia] Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft, malleable, and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided.
Core metadata
| is a | Concept | feature of interest |
| changed on | 17 Nov 2023 08:31:48.138 |
| submitted by | Hélène Bressan |
| accepted on | 22 May 2023 15:01:30.606 |
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| date accepted |
22 May 2023 15:01:30.606
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| date submitted |
22 May 2023 13:21:09.478
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| definition |
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| description |
[Wikipedia] Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft, malleable, and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided.
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Concept
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| modified |
17 Nov 2023 08:31:48.138
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| notation |
c_ec54c81f
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| register |
mots clefs
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| status |
status experimental
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register item
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| version info |
4
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Definition
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Th
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| description |
[Wikipedia] Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft, malleable, and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided.
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| exact match |
c ec54c81f
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| in scheme |
Vocabulaire des mots clefs
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| same as |
c ec54c81f
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| top concept of |
Vocabulaire des mots clefs
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Concept
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| was attributed to |
Pole THEIA
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