what is the oxidation state of scandium
The properties of scandium compounds are intermediate between those of aluminium and yttrium. A diagonal relationship exists between the behavior of magnesium and scandium , just as there is between beryllium and aluminium. In the chemical compounds of the elements in group 3, the predominant oxidation state is +3. All members of this group (except for scandium ) form compounds in which they exist as M 2 + .