化学元素硒对人们来说并不陌生,只要将元素周期表中第四周期与第六主族延长相交,就可以找到它的位置.硒的原子序数34,符号Se.1817年,瑞典化学家柏齐利乌斯从硫酸厂的铅室泥中发现了硒以后,很长一段时间里一直受到人们的冷落,只是近些年随着科学技术的发展,硒才 The chemical element selenium is not unfamiliar to people, as long as the fourth cycle of the periodic table and the extension of the sixth main group can be found, its position can be found. Selenium atomic number 34, symbol Se.1817, Swedish chemist Bozilius discovered selenium from the mud in the lead room of the sulfuric acid plant and it has been neglected for a long time. However, with the development of science and technology in recent years, selenium has been