Statements (74)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:chemical_compound
|
| gptkbp:application |
research in nuclear science
|
| gptkbp:block |
f-block
|
| gptkbp:casnumber |
7440-13-3
|
| gptkbp:category |
actinide
|
| gptkbp:chemical_analysis |
analyzed using mass spectrometry.
|
| gptkbp:chemical_formula |
actinides
|
| gptkbp:chemical_synthesis |
synthesized in laboratories.
|
| gptkbp:color |
silvery metallic
|
| gptkbp:community |
of interest to nuclear chemists.
|
| gptkbp:composed_by |
produced in nuclear reactors.
|
| gptkbp:cooling_system |
12 W/(m· K)
|
| gptkbp:defense_mechanism |
requires protective equipment.
|
| gptkbp:discovered_by |
gptkb:Glenn_T._Seaborg
|
| gptkbp:discovery |
gptkb:USA
chemical separation |
| gptkbp:discovery_year |
gptkb:1949
|
| gptkbp:dissolved |
insoluble
|
| gptkbp:electronegativity |
1.1 (Pauling scale)
[ Rn] 5f² 6d¹ 7s² |
| gptkbp:element_classification |
classified as a radioactive element.
|
| gptkbp:elemental_form |
exists as a solid.
|
| gptkbp:engine |
limited due to rarity.
|
| gptkbp:environmental_impact |
radioactive waste.
|
| gptkbp:financial_stability |
stable in inert atmosphere.
|
| gptkbp:fission_products |
produced in nuclear reactors.
|
| gptkbp:fuel_type |
potential use in advanced reactors.
|
| gptkbp:funding |
funded by nuclear research grants.
|
| gptkbp:has_spectral_type |
used in spectroscopy.
|
| gptkbp:historical_context |
discovered during the Manhattan Project.
|
| gptkbp:historical_significance |
first element to be isolated from uranium.
|
| https://www.w3.org/2000/01/rdf-schema#label |
protactinium
|
| gptkbp:international_relations |
important for understanding fission.
|
| gptkbp:is_set_in |
gptkb:neptunium
uranium plutonium thorium |
| gptkbp:isotopes |
91
alpha emitter Pa-231 most isotopes are unstable. |
| gptkbp:lifespan |
32,760 years (Pa-231)
|
| gptkbp:magnetic_susceptibility |
-1.5 x 10⁻⁶ m³/mol
|
| gptkbp:material |
used in some nuclear applications.
|
| gptkbp:melting_point |
1,200 ° C
3,200 ° C |
| gptkbp:members |
gptkb:3
|
| gptkbp:neutron_capture |
used in neutron capture studies.
|
| gptkbp:nuclear_physics |
important for nuclear reactions.
|
| gptkbp:occurs_in |
trace amounts in uranium ores
|
| gptkbp:origin |
from the Greek word 'protos' meaning 'first' and 'actinium'.
|
| gptkbp:oxidation_states |
+5, +4, +3
|
| gptkbp:period |
gptkb:7
|
| gptkbp:population_density |
15.37 g/cm³
|
| gptkbp:power_source |
5.89 e V
|
| gptkbp:related_products |
forms various oxides.
|
| gptkbp:research_importance |
important for nuclear physics.
|
| gptkbp:research_institutes |
studied in nuclear research facilities.
|
| gptkbp:roll_rate |
1/2
|
| gptkbp:safety |
requires handling with care.
requires special handling. |
| gptkbp:safety_measures |
regulated by nuclear safety authorities.
|
| gptkbp:species |
0.0007 mg/kg
|
| gptkbp:storage |
stored in inert gas.
|
| gptkbp:structure |
orthorhombic
|
| gptkbp:symbol |
gptkb:Pavo
|
| gptkbp:toxicity |
highly toxic
|
| gptkbp:uses |
nuclear reactors
|
| gptkbp:was_a_response_to |
used in research.
reacts with halogens. similar to uranium. |
| gptkbp:waste_management |
requires careful disposal.
|
| gptkbp:bfsParent |
gptkb:Mendeleev's_Periodic_Table
|
| gptkbp:bfsLayer |
5
|