Se
元素符号:Se
中文名称:硒
英文名称:Selenium
原子序数:34
原子量:78.96
外围电子排布:4s2 4p4
核外电子排布:2,8,18,6
常见化合价:-2,+4,+6
密度:4.79
溶点:217
沸点:684.9
所属周期:4
所属族数:VIA
原子半径:1.22
离子半径:0.50(+4)
共价半径:1.16
同位素及放射性:Se-74 Se-76 Se-77 Se-78 *Se-80 Se-82
发现人:J鰊s Berzelius
发现时间:1818
发现地点:瑞典
名称由来:Greek: sel阯?(moon).
元素描述:Soft metalloid similar to sulfur. Ranges from gray metallic to red glassy appearance.
元素来源:Obtained from lead, copper and nickel refining. Conducts electricity when struck by light.
元素用途:Light causes it to conduct electricity more easily. It is used in photoelectric cells, TV cameras, xerography machines and as a semiconductor in solar batteries and rectifiers. Also colors glass red.