Because actinium is very rare his chemistry is only superficially known; of course actinium doesn't react with noble gases.
Some metals in the table do not react with water
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.
Applications of actinium are: - neutron source as actinium-beryllium - radiotherapy
The chemistry of actinium is badly known; probable actinium may be combined withe the majority of nonmetals.
Actinium is a radioactive element with symbol Ac.
Actinium is a radioactive natural chemical element, member of the family of actinides; actinium is a solid metal, very rare in the nature.
Actinium is a natural chemical element, radioactive; actinium is a decay product of uranium.
Yes, actinium is an inner transition metal.
Actinium had any contribution to our society.
As a highly radioactive element actinium may be lethal.