|
gptkbp:instance_of
|
gptkb:chemical_compound
|
|
gptkbp:bfsLayer
|
5
|
|
gptkbp:bfsParent
|
gptkb:Mendeleev's_Periodic_Table
|
|
gptkbp:application
|
research in nuclear science
used in atomic batteries
used in luminous dials
used in radiation sources
used in thickness gauges
|
|
gptkbp:category
|
lanthanide
|
|
gptkbp:color
|
metallic
silvery-white
|
|
gptkbp:contains_allergens
|
gptkb:none
|
|
gptkbp:cooling_system
|
0.12 W/(m· K)
|
|
gptkbp:discovered_by
|
gptkb:USA
gptkb:Jacob_A._Marinsky
|
|
gptkbp:dissolved
|
insoluble in water
soluble in acids
|
|
gptkbp:electronegativity
|
1.1 (Pauling scale)
|
|
gptkbp:emissions_standard
|
visible spectrum
|
|
gptkbp:environmental_impact
|
low due to rarity
|
|
gptkbp:has_spectral_type
|
promethium emission spectrum
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
promethium
|
|
gptkbp:isotopes
|
gptkb:theorem
gptkb:Pm-139
gptkb:Pm-141
gptkb:Pm-144
gptkb:Pm-146
61
Pm-140
Pm-142
Pm-143
Pm-145
Pm-147
Pm-148
|
|
gptkbp:lifespan
|
17.7 years (Pm-147)
|
|
gptkbp:melting_point
|
3000 K
1042 K
|
|
gptkbp:notable_conductors
|
0.001 S/m
|
|
gptkbp:occurs_in
|
rare in nature
|
|
gptkbp:origin
|
Greek mythology (Prometheus)
|
|
gptkbp:population
|
7.26 g/cm³
|
|
gptkbp:products
|
promethium carbonate
promethium chloride
promethium fluoride
promethium oxide
promethium sulfate
|
|
gptkbp:safety_features
|
radioactive material
|
|
gptkbp:social_structure
|
+3
hexagonal
|
|
gptkbp:symbol
|
Pm
|
|
gptkbp:uses
|
gptkb:painting
nuclear batteries
|
|
gptkbp:was_a_response_to
|
reacts with water
reacts with acids
forms oxides in air
|
|
gptkbp:year_created
|
1945
|