准金属，类金属具有一些金属化学特性的非金属元素，例如砷。
A nonmetallic element, such as arsenic, that has some of the chemical properties of a metal.
用显色络合物络合比和试剂结构研究并初步探讨了不对称变色酸双偶氮类衍生物与贵金属元素的络合机理。
The complexing mechanism of unsymmetric bis-arylazo derivative of chromotropic acid and precious metal elements was studied using composition ratio of the color complex and constitution of reagents.
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