|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
silvery gray metal
|
|
gptkbp:atomicNumber
|
43
|
|
gptkbp:block
|
d-block
|
|
gptkbp:boilingPoint
|
4265 K
|
|
gptkbp:CASNumber
|
7440-26-8
|
|
gptkbp:category
|
synthetic element
transition metal
|
|
gptkbp:crystalSystem
|
hexagonal close-packed
|
|
gptkbp:density
|
11 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Emilio_Segrè
gptkb:Carlo_Perrier
|
|
gptkbp:discoveredIn
|
1937
|
|
gptkbp:electronConfiguration
|
[Kr] 4d5 5s2
|
|
gptkbp:electronegativity
|
1.9 (Pauling scale)
|
|
gptkbp:firstArtificialElement
|
true
|
|
gptkbp:firstIonizationEnergy
|
702 kJ/mol
|
|
gptkbp:foundIn
|
uranium ores (trace amounts)
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Technetium
|
|
gptkbp:isotopes
|
gptkb:Technetium-99
gptkb:Technetium-97
gptkb:Technetium-98
gptkb:Technetium-99m
|
|
gptkbp:IUPACName
|
technetium
|
|
gptkbp:magneticOrdering
|
paramagnetic
|
|
gptkbp:massNumber
|
98 u (most stable isotope)
|
|
gptkbp:meltingPoint
|
2157 K
|
|
gptkbp:molarHeatCapacity
|
24.27 J/(mol·K)
|
|
gptkbp:mostStableIsotope
|
gptkb:Technetium-99
gptkb:Technetium-98
|
|
gptkbp:namedAfter
|
Greek word 'technetos' (artificial)
|
|
gptkbp:naturalOccurrence
|
synthetic
|
|
gptkbp:neutrons
|
55 (in Tc-98)
|
|
gptkbp:numberOfElectrons
|
43
|
|
gptkbp:oxidationStates
|
+2
+7
+5
+6
+4
|
|
gptkbp:period
|
5
|
|
gptkbp:positionInPeriodicTable
|
between molybdenum and ruthenium
|
|
gptkbp:protons
|
43
|
|
gptkbp:radioactive
|
gptkb:beta_decay
true
|
|
gptkbp:relatedGroup
|
7
|
|
gptkbp:standardState
|
gptkb:stone
|
|
gptkbp:symbol
|
Tc
|
|
gptkbp:thermalConductivity
|
50.6 W/(m·K)
|
|
gptkbp:uses
|
medical imaging
corrosion protection
radiopharmaceuticals
|
|
gptkbp:bfsParent
|
gptkb:Technetium-99m
gptkb:TC-137B
|
|
gptkbp:bfsLayer
|
6
|