The element scandium is in the third family of the periodic table. Each column of the table is called a group or family, and from left to right, they are numbered one through 18. Scandium is in the third column, so it is in group three.
Scandium is element number 21, and it has an atomic weight of 44.956 atomic mass units. It is a metal that makes cations with a +3 charge. While scandium can be extracted from minerals, it is usually a byproduct of uranium refineries. Scandium-aluminum alloys are used in metallic items that must be strong without being brittle. Examples include baseball bats and lacrosse sticks.