Statements (45)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:chemical_compound
|
| gptkbp:bfsLayer |
6
|
| gptkbp:bfsParent |
gptkb:Periodic_Table_of_Elements
|
| gptkbp:analyzes |
difficult to handle due to radioactivity
|
| gptkbp:application |
targeted alpha therapy
|
| gptkbp:category |
halogen
|
| gptkbp:color |
black or dark brown
|
| gptkbp:composed_of |
produced in particle accelerators
similar to iodine |
| gptkbp:cooling_system |
low
|
| gptkbp:diplomatic_relations |
alpha emitter
|
| gptkbp:discovered_by |
Emilio Segrè
|
| gptkbp:displacement |
can occur with halides
|
| gptkbp:dissolved |
low
|
| gptkbp:electronegativity |
2.2 (Pauling scale)
[ Xe] 4f14 5d10 6s2 6p5 |
| https://www.w3.org/2000/01/rdf-schema#label |
Astatine
|
| gptkbp:isotopes |
gptkb:theorem
85 At-210 At-211 At-212 At-213 |
| gptkbp:lifespan |
1.5 hours (At-212)
25.1 minutes (At-213) 7.2 hours (At-211) 8.1 hours (At-210) |
| gptkbp:melting_point |
302 ° C
337 ° C |
| gptkbp:mode |
alpha decay, beta decay
|
| gptkbp:occurs_in |
very rare
produced in trace amounts |
| gptkbp:population |
7.0 g/cm³
|
| gptkbp:power_output |
9.3 e V
|
| gptkbp:products |
Astatine fluoride (At F)
|
| gptkbp:side_effect |
radioactive toxicity
|
| gptkbp:social_structure |
cubic
-1, +1, +3, +5 |
| gptkbp:species |
< 1 ppb
|
| gptkbp:symbol |
At
|
| gptkbp:uses |
research purposes
radiotherapy |
| gptkbp:was_a_response_to |
forms compounds with metals
less reactive than other halogens |
| gptkbp:year_created |
gptkb:1940
|