Co
元素符号:Co
中文名称:钴
英文名称:Cobalt
原子序数:27
原子量:58.93
外围电子排布:3d7 4s2
核外电子排布:2,8,15,2
常见化合价:+2,+3
密度:8.9
溶点:1495
沸点:2927
所属周期:4
所属族数:VIII
原子半径:1.67
离子半径:0.65(+2)
共价半径:1.16
同位素及放射性:Co-59
发现人:George Brandt
发现时间:1739
发现地点:瑞典
名称由来:German: kobold (goblin).
元素描述:Hard, ductile, lustrous bluish-gray metal. Exists in the earth's curst in cocentrations of about 25 ppm. It has remarkable magnetic properties.
元素来源:Occurs in compounds with arsenic, oxygen and sulfur as in cobaltine (CoAsS) and linneite (Co3S4). Pure cobalt is obtained as a byproduct of refining nickel, copper and iron.
元素用途:Used in many hard alloys; for magnets, ceramics and special glasses. Remains hard up to 982癈. Radioactive cobalt-60 is used in cancer therapy.