Caesium

[si:ziәm]

解释:

(n.) A rare alkaline metal found in mineral water; -- so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic weight 132.6.

校对:韦恩

About(关于我们)|Sitemap(网站地图)

Copyright © 2018 EnMama.net. All rights reserved.