Element: actinium |
Name : actinium |
Symbol : Ac |
Atomicnumber : 89 |
Relativeatomicmass : [ 227 ] (longest lived isotope) |
Standardstate : solid at 298 K |
Appearance : silvery |
Classification : Metallic |
Groupinperiodictable : None |
Groupname : Actinoid |
Periodinperiodictable : 7 (actinoid) |
Blockinperiodictable : f |
Shellstructure : 2.8.18.32.18.9.2 |
CASRegistry : 7440-34-8 |
Description : Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum. It is found naturally in uranium ores and actinium is 150 times m |