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Online dictionary - over 2 million references

 





selenium


1. 硫磺小组的一非金属元素和类似于硫磺在它的化合物。 它在自由州少量找到与硫磺和一些硫磺矿石,并且获得作为黑暗的带红色粉末或水晶大量,或者作为一种黑暗的金属看的物质。 陈列在光的行动之下在电传导性上的卓越的变化和用于某些电用具。 标志Se。 原子量78.9。
2. 一个毒性非金属元素与硫磺和碲关连; 发生以几营业异常的形式; 一个稳定的灰色metallike同素异形体在光更好举办电比在黑暗和用于光电池; 在硫化物矿石发生作为硫铁矿


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