Editing Scandium (section)

===Chemical characteristics===
Scandium is a soft metal with a silvery appearance. It develops a slightly yellowish or pinkish cast when [[redox|oxidized]] by air. It is susceptible to weathering and dissolves slowly in most dilute [[acids]]. It does not react with a 1:1 mixture of [[nitric acid]] ({{chem2|HNO3}}) and 48.0% [[hydrofluoric acid]] ({{chem2|HF}}), possibly due to the formation of an impermeable [[passivation (chemistry)|passive layer]]. Scandium turnings ignite in the air with a brilliant yellow flame to form [[scandium oxide]].<ref>"[http://periodic.lanl.gov/21.shtml Scandium]." Los Alamos National Laboratory. Retrieved 2013-07-17.</ref>