Group: Vanadium group
All metals from the vanadium group (5th subgroup) have similar chemical properties. Niobium and tantalum were formerly referred to as acidic earths or earth acids because of their character as acid formers.
All metals from the vanadium group (5th subgroup) have similar chemical properties. Niobium and tantalum were formerly referred to as acidic earths or earth acids because of their character as acid formers.