Statements (55)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:chemical_compound
|
| gptkbp:bfsLayer |
5
|
| gptkbp:bfsParent |
gptkb:Fermium
gptkb:Mendeleev's_Periodic_Table |
| gptkbp:appearance |
silvery-white metal
|
| gptkbp:category |
actinide
|
| gptkbp:clinical_trial |
radiotherapy
|
| gptkbp:color |
silvery-white
|
| gptkbp:composed_of |
can be produced from neutron bombardment of thorium
can be produced from decay of actinium-227 can be produced from decay of radium can be produced from uranium decay |
| gptkbp:cooling_system |
12.5 W/(m· K)
|
| gptkbp:discovered_by |
gptkb:Friedrich_Oskar_Giesel
gptkb:government_agency |
| gptkbp:displacement |
can displace other metals from their compounds
|
| gptkbp:dissolved |
insoluble
|
| gptkbp:electronegativity |
1.1 (Pauling scale)
|
| https://www.w3.org/2000/01/rdf-schema#label |
actinium
|
| gptkbp:is_analyzed_in |
nuclear physics
neutron radiography nuclear science radiochemistry |
| gptkbp:is_found_in |
mineral pitchblende
mineral uraninite mineral autunite mineral carnotite mineral torbernite |
| gptkbp:isotopes |
gptkb:Ac-225
gptkb:Ac-226 gptkb:Ac-227 gptkb:theorem 89 Ac-224 Ac-228 |
| gptkbp:lifespan |
21.64 years (Ac-227)
|
| gptkbp:melting_point |
1050 ° C
boiling point not well defined |
| gptkbp:named_after |
Greek word 'aktinos' meaning 'ray'
|
| gptkbp:notable_conductors |
good conductor
|
| gptkbp:occurs_in |
found in trace amounts in uranium and thorium ores
|
| gptkbp:population |
10.07 g/cm³
|
| gptkbp:replaced_by |
gptkb:Friedrich_Oskar_Giesel
|
| gptkbp:safety_features |
radioactive hazard
|
| gptkbp:set_in |
gptkb:francium
gptkb:protactinium radium uranium thorium |
| gptkbp:social_structure |
+3
face-centered cubic |
| gptkbp:symbol |
Ac
|
| gptkbp:uses |
used in neutron sources
|
| gptkbp:water_management |
requires special handling due to radioactivity
|
| gptkbp:year_created |
1899
|