Actinium (Ac) is a chemical element.
Actinoids is the name of the radioactive elements family which contain actinium.
family name of rare earth element series of helium
metal is it family and rare earth element is used if you do not know the family property
Yes it is objectiveness is a rare earth element bitchezz
Curium is a member of the actinoids family.
Xenon belongs to noble gas family
Helium is a member of the family of noble gases.
It is in the family name of transition metals Enjoy:D
Four series exist: thorium, uranium, neptunium, actinium.
Earth
Polonium is a member of the group 16 of the periodic table of Mendeleev (chalcogens).
No, it does not.
Actinium exist in minute traces associated with uranium or thorium ores.