thallium 的定义
Chemistry.
- a soft, malleable, rare, bluish-white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides. Symbol: Tl; atomic weight: 204.37; atomic number: 81; specific gravity: 11.85 at 20°C.
更多thallium例句
- Thallium is a rare metal, found in small quantities in some varieties of iron and copper pyrites, and in some lithia micas.
- A stream of incandescent thallium-vapour passes between them, the magnified image of which is now seen upon the screen.
- Light of one degree of refrangibility—that corresponding to this particular green—is emitted by the thallium-vapour.
- If we add to the silver in our camera a bit of thallium, we shall obtain the light of both metals.
- After waiting a little, we see that the green of the thallium lies midway between the two greens of the silver.