|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:allotropes
|
amorphous boron
crystalline boron
|
|
gptkbp:appearance
|
black-brown
|
|
gptkbp:atomicNumber
|
5
|
|
gptkbp:atomicWeight
|
10.81
|
|
gptkbp:block
|
p-block
|
|
gptkbp:boilingPoint
|
4200 K
|
|
gptkbp:CASNumber
|
7440-42-8
|
|
gptkbp:category
|
metalloid
|
|
gptkbp:countryOfOrigin
|
gptkb:China
gptkb:Russia
gptkb:Turkey
gptkb:United_States
|
|
gptkbp:crystalSystem
|
rhombohedral
|
|
gptkbp:density
|
2.34 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Joseph_Louis_Gay-Lussac
gptkb:Louis_Jacques_Thénard
|
|
gptkbp:discoveredIn
|
1808
|
|
gptkbp:electronConfiguration
|
[He] 2s2 2p1
|
|
gptkbp:electronegativity
|
2.04
|
|
gptkbp:foundIn
|
gptkb:kernite
gptkb:ulexite
borax
|
|
gptkbp:hardnessMohs
|
9.5
|
|
gptkbp:isomerOf
|
gptkb:Boron-10
gptkb:Boron-11
|
|
gptkbp:IUPACName
|
boron
|
|
gptkbp:meltingPoint
|
2349 K
|
|
gptkbp:namedAfter
|
borax
|
|
gptkbp:naturalAbundance
|
Boron-10: ~20%
Boron-11: ~80%
|
|
gptkbp:oxidationStates
|
+3
|
|
gptkbp:period
|
2
|
|
gptkbp:radioactive
|
gptkb:Boron-12
gptkb:Boron-8
|
|
gptkbp:relatedGroup
|
13
|
|
gptkbp:requires
|
plant growth
|
|
gptkbp:standardState
|
gptkb:stone
|
|
gptkbp:symbol
|
B
|
|
gptkbp:thermalConductivity
|
27 W/(m·K)
|
|
gptkbp:toxicity
|
low
|
|
gptkbp:usedIn
|
nuclear reactors
fiberglass
abrasives
rocket fuels
|
|
gptkbp:uses
|
gptkb:glass
semiconductors
detergents
neutron absorber
|
|
gptkbp:bfsParent
|
gptkb:OpenDaylight
|
|
gptkbp:bfsLayer
|
5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Boron
|