Cr
元素符号:Cr
中文名称:铬
英文名称:Chromium
原子序数:24
原子量:52.00
外围电子排布:3d5 4s1
核外电子排布:2,8,13,1
常见化合价:+2,+3,+6
密度:7.19
溶点:1857
沸点:2672
所属周期:4
所属族数:VIB
原子半径:1.85
离子半径:0.62(+3)
共价半径:1.18
同位素及放射性:Cr-50 *Cr-52 Cr-53 Cr-54
发现人:Louis Vauquelin
发现时间:1797
发现地点:法国
名称由来:Greek: chr鬽a (color).
元素描述:Very hard, crystalline, steel-gray metal. The pure metal has a blue-white color. It is hard, brittle and corrsion-resistant at normal temperatures.
元素来源:Chromite [Fe,Mg(CrO4)] is its most important mineral. Produced commercially by heating its ore in the presence of silicon or aluminium.
元素用途:Used to make stainless steel. It gives the color to rubies and emeralds. Iron-nickel-chromium alloys in various percentages yield an incredible variety of the most important metals in modern technology.