This element is actinium (Ac).
Actinium is a natural element but because is extremely difficult to be separated from ores it is practically obtained artificially in laboratory.
Actinium is a natural chemical element, it is not a man-made element.
Actinium is a trivalent chemical element.
Actinium is a trivalent chemical element.
any nickname (and generally for the chemical elements) for actinium
Applications of actinium are: - neutron source as actinium-beryllium - radiotherapy
Actinium is a radioactive element with symbol Ac.
Actinium is a natural chemical element, radioactive; actinium is a decay product of uranium.
Actinium is found in various countries around the world, primarily in mineral deposits such as uranium ores. It is a rare radioactive element and is typically extracted as a byproduct of uranium and thorium processing.
The first name was also actinium.
Actinium has a white-silvery metallic appearance.