Symbol

Sc

Atomic Number

21

Atomic Mass

44.9559

Family

Group 3 (Iiib) Transition Metal Pronunciation

SCAN-dee-um

Overview

The existence of scandium was predicted nearly ten years before it was actually discovered. The prediction was made by Russian chemist Dmitri Mendeleev (1834-1907). Mendeleev developed the periodic table based on his periodic law. The periodic table is a chart that shows how chemical elements are related to one another. The table originally had a number of empty boxes for elements that had not been discovered. Chemists were able to search for these elements based on the properties of the elements around the empty boxes. Scandium was found in 1879 by Swedish chemist Lars Nilson (1840-99). It is a transition metal, appearing in Group 3 (IIIB).

Scandium is a moderately abundant element. However, it tends to be spread out throughout the earth rather than concentrated in a few places. This makes it difficult to isolate. In...