鉻者,化學元素也,符號Cr,原子序廿四,屬過渡金屬。色銀灰,不溶於水。
公元一七九七年,法國人路易·尼古拉·沃克朗察之。
同位素者廿八,自鉻四二至鉻六七。性穩者有三,曰鉻五二,曰鉻五三,曰鉻五四。
可煉鉻鐵礦(Chromite,(Fe,Mg)Cr2O4)得之。
可製不鏽鋼、自動車零件、工具、磁帶、錄像帶之類。鍍鉻可防鏽,堅而貌美也。
其氧化物鉻酸根者(CrO42-)色黃。重鉻酸根者(Cr2O72-)色橙。Cr3+者色淡綠,Cr6+者有毒矣。
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