Statements (52)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:chemical_compound
|
| gptkbp:bfsLayer |
5
|
| gptkbp:bfsParent |
gptkb:Mendeleev's_Periodic_Table
|
| gptkbp:application |
environmental monitoring
biomedical research nuclear medicine catalysts industrial radiography radiation shielding radiopharmaceuticals research in nuclear physics neutron capture therapy tracers in geology |
| gptkbp:base |
moderate
|
| gptkbp:category |
transition metal
|
| gptkbp:color |
silvery-gray
|
| gptkbp:cooling_system |
54 W/(m· K)
|
| gptkbp:discovered_by |
gptkb:Italy
Carlo Perrier |
| gptkbp:dissolved |
low
high |
| gptkbp:electronegativity |
1.9 (Pauling scale)
|
| https://www.w3.org/2000/01/rdf-schema#label |
technetium
|
| gptkbp:isotopes |
gptkb:battle
43 Tc-98 Tc-99m molybdenum-98 ruthenium-98 |
| gptkbp:lifespan |
2.1 million years (Tc-97)
211,100 years (Tc-98) 4.2 million years (Tc-96) 6 hours (Tc-99m) |
| gptkbp:material |
used in superalloys
used in steel |
| gptkbp:melting_point |
2157 K
4265 K |
| gptkbp:notable_conductors |
1.0 × 10^6 S/m
|
| gptkbp:occurs_in |
not found in nature in significant amounts
|
| gptkbp:population |
11.5 g/cm³
|
| gptkbp:safety_features |
toxic in large amounts
radioactive hazard |
| gptkbp:social_structure |
+6
+5 +3 +7 hexagonal close-packed +4 |
| gptkbp:symbol |
Tc
|
| gptkbp:uses |
gptkb:Photographer
nuclear batteries |
| gptkbp:year_created |
1937
|