|
gptkbp:instance_of
|
gptkb:chemical_compound
|
|
gptkbp:bfsLayer
|
6
|
|
gptkbp:bfsParent
|
gptkb:Periodic_Table_of_Elements
|
|
gptkbp:appearance
|
silvery metallic
|
|
gptkbp:application
|
nuclear physics
neutron sources
medical isotopes
radiochemistry
|
|
gptkbp:block
|
f-block
|
|
gptkbp:capacity
|
0.23 J/(g· K)
|
|
gptkbp:category
|
actinide
|
|
gptkbp:color
|
silvery
|
|
gptkbp:composed_of
|
reacts with halogens
reacts with acids
reacts with oxygen
forms compounds with other elements
neutron capture of uranium
|
|
gptkbp:cooling_system
|
12.5 W/(m· K)
|
|
gptkbp:discovered_by
|
gptkb:Edwin_Mc_Millan
gptkb:University
|
|
gptkbp:dissolved
|
insoluble in water
soluble in acids
|
|
gptkbp:electronegativity
|
1.36 (Pauling scale)
[ Rn] 5f⁴ 6d¹ 7s²
|
|
gptkbp:environmental_impact
|
radioactive waste
|
|
gptkbp:historical_period
|
gptkb:television_series
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Neptunium
|
|
gptkbp:is_a_fusion_of
|
not typically used
|
|
gptkbp:isotopes
|
gptkb:Np-237
gptkb:theorem
93
Np-235
Np-236
can be produced in reactors
|
|
gptkbp:lifespan
|
2.14 million years (Np-237)
|
|
gptkbp:melting_point
|
4131 ° C
644 ° C
|
|
gptkbp:members
|
actinides
|
|
gptkbp:occurs_in
|
trace amounts in uranium ores
|
|
gptkbp:population
|
20.45 g/cm³
|
|
gptkbp:produced_by
|
from spent nuclear fuel
|
|
gptkbp:regulatory_compliance
|
controlled substance
|
|
gptkbp:safety_features
|
handled with care
|
|
gptkbp:side_effect
|
radiation exposure
|
|
gptkbp:social_structure
|
+6
+5
+3
face-centered cubic
+4
|
|
gptkbp:storage
|
shielded containers
|
|
gptkbp:symbol
|
Np
|
|
gptkbp:type_of
|
7439-99-8
|
|
gptkbp:uses
|
gptkb:weapon
gptkb:Research_Institute
nuclear reactors
|
|
gptkbp:was_a_response_to
|
similar to plutonium
similar to uranium
|
|
gptkbp:year_created
|
gptkb:1940
|