strontium
锶,锶元素,锶的,锶的作用
Definitions
- 1
Chemistry.
- : a bivalent, metallic element whose compounds resemble those of calcium, found in nature only in the combined state, as in strontianite: used in fireworks, flares, and tracer bullets. Symbol: Sr; atomic weight: 87.62; atomic number: 38; specific gravity: 2.6.
Examples
When people eat and drink in a specific area for a long time, their teeth absorb a small amount of strontium, an element that leaches out of the rocky ground into food and drinking water.
He and colleagues first boiled a lump of strontium metal and channeled that vapor down a tube.
Using a second laser, the researchers knocked an electron off each atom, creating a plasma of negatively charged electrons and positive strontium ions.
I placed the steel tank near the cage, uncoiled the hose attachment, unscrewed the top, and dumped in the salts of strontium.
In the absence of baryta or lime it is filtered off, and weighed as strontium carbonate, which contains 70.17 per cent.
The solution contains the barium as baric chloride mixed, perhaps, with salts of strontium or lime.
In this last case it may be examined for barium and strontium, the former of which will rarely be present.
It was established that strontium-90 and cesium-137, important in fallout on land, enter the marine cycles only in minute amounts.