Scandium

Mô tả

Scandiumis achemical elementwith symbolScandatomic number21. A silvery-white metallictransition metal, it has historically been sometimes classified as arare earth element, together withyttriumand thelanthanoids. It was discovered in 1879 by spectral analysis of the mineralseuxeniteandgadolinitefromScandinavia.

Scandium is a soft metal with a silvery appearance. It develops a slightly yellowish or pinkish cast when oxidized by air. It is susceptible to weathering and dissolves slowly in most dilute acids. It does not react with a 1:1 mixture ofnitric acid(HNO3) andhydrofluoric acid(HF), possibly due to the formation of an impermeablepassive layer.

ỨNG DỤNG

KeywordsElectronic chemicals

Phiếu kiểm nghiệm