Element: technetium |
Name : technetium |
Symbol : Tc |
Atomicnumber : 43 |
Relativeatomicmass : [ 98 ] (longest lived isotope) |
Standardstate : solid at 298 K |
Appearance : silvery grey metallic |
Classification : Metallic |
Groupinperiodictable : 7 |
Groupname : (none) |
Periodinperiodictable : 5 |
Blockinperiodictable : d |
Shellstructure : 2.8.18.14.1 |
CASRegistry : 7440-26-8 |
Description : Since its discovery, searches for the element technetium in terrestrial materials have been made without success. |