Statements (21)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:chemical_compound
|
| gptkbp:appearance |
unknown (likely metallic or dark)
|
| gptkbp:atomicNumber |
85
|
| gptkbp:boilingPoint |
610 K
|
| gptkbp:CASNumber |
7440-68-8
|
| gptkbp:density |
7 g/cm³
|
| gptkbp:discoveredBy |
gptkb:Emilio_Segrè
gptkb:Dale_R._Corson gptkb:Kenneth_Ross_MacKenzie |
| gptkbp:discoveredIn |
1940
|
| https://www.w3.org/2000/01/rdf-schema#label |
Astatine
|
| gptkbp:meltingPoint |
302 K
|
| gptkbp:mostStableIsotope |
gptkb:Astatine-210
|
| gptkbp:period |
6
|
| gptkbp:radioactive |
true
|
| gptkbp:relatedGroup |
17
halogen |
| gptkbp:standardState |
gptkb:stone
|
| gptkbp:symbol |
At
|
| gptkbp:bfsParent |
gptkb:Halogen
|
| gptkbp:bfsLayer |
6
|