他们还发现，元素周期表中的第一号金属元素在室温下为气态。
They may also have found the first metal that is a gas at room temperature.
纯金属是在元素周期表中占据特定位置的元素。
Pure metals are elements which come from a particular area of the periodic table.
本文介绍金属活动顺序表的使用条件。
This article means to introduce the use-condition of metal activity series table.
本文介绍金属活动顺序表的使用条件。
This article means to introduce the use-condition of metal activity series table.
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