osmium 的定义
Chemistry.
- a hard, heavy, metallic element having the greatest density of the known elements and forming octavalent compounds, as OsO4 and OsF8: used chiefly as a catalyst, in alloys, and in the manufacture of electric-light filaments. Symbol: Os; atomic weight: 190.2; atomic number: 76; specific gravity: 22.57.
更多osmium例句
- But the osmium and uranium alloyed with it are something else.
- Osmium 187 was stable, but it wasn't a normally used step toward Mercury 203.
- The native alloy of osmium and iridium does not alloy with gold, however, but falls to the bottom of the molten metal.
- The gold may contain an alloy of osmium and iridium; if so, it should be weighed and treated with aqua regia.
- Even a chemist can see that that means a lack of heavy metals—no osmium, no uranium, no radium.