Other contributors have said "What Family does Scandium belongs to?" is the same question as "What family does the element scandium belong to?" If you believe that these are not asking the same thing and should be answered differently, click here
Niobium belongs to The Vandadium Family of elements (which is part of the transition metals). In the new IUPAC numbering, the Vanadium family is Group 5.
Polonium is in the chalcogen family but is commonly said as the oxygen family. - Polonium is in the 16th group of the periodic table - Polonium is a metalloid - Polonium is a natural radioactive...