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strontium

[ stron-shee-uhm, -shuhm, -tee-uhm ]

noun

, Chemistry.
  1. 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. : Sr; : 87.62; : 38; : 2.6.


strontium

/ ˈstrɒntɪəm /

noun

  1. a soft silvery-white element of the alkaline earth group of metals, occurring chiefly in celestite and strontianite. Its compounds burn with a crimson flame and are used in fireworks. The radioisotope strontium-90, with a half-life of 28.1 years, is used in nuclear power sources and is a hazardous nuclear fall-out product. Symbol: Sr; atomic no: 38; atomic wt: 87.62; valency: 2; relative density: 2.54; melting pt: 769°C; boiling pt: 1384°C


strontium

/ strŏnchē-əm,-tē-əm /

  1. A soft, silvery metallic element of the alkaline-earth group that occurs naturally only as a sulfate or carbonate. One of its isotopes is used in the radiometric dating of rocks. Because strontium salts burn with a red flame, they are used to make fireworks and signal flares. Atomic number 38; atomic weight 87.62; melting point 777°C; boiling point 1,382°C; specific gravity 2.54; valence 2.


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Other Words From

  • stron·tic [stron, -tik], adjective
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Word History and Origins

Origin of strontium1

First recorded in 1800–10; stront(ia) + -ium
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Word History and Origins

Origin of strontium1

C19: from New Latin, from strontian
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Example Sentences

Instead, their foundation is pancake-like structures of super-chilled strontium atoms.

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.

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