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  • ๐Ÿ‡ฌ๐Ÿ‡ง Strontium
  • ๐Ÿ‡จ๐Ÿ‡ณ ้ถ
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Strontium
  • ๐Ÿ‡ซ๐Ÿ‡ท Strontium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Strontium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืกื˜ืจื•ื ืฆื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Stronzio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใ‚นใƒˆใƒญใƒณใƒใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Estrôncio
  • ๐Ÿ‡ท๐Ÿ‡บ ะกั‚ั€ะพะฝั†ะธะน
  • ๐Ÿ‡ช๐Ÿ‡ธ Estroncio
  • ๐Ÿ‡ธ๐Ÿ‡ช Strontium

Strontium: the essentials

Strontium atoms have 38 electrons and the shell structure is 2.8.18.8.2. The ground state electronic configuration of neutral strontium is [Kr].5s2 and the term symbol of strontium is 1S0.

Strontium: description  

Strontium does not occur as the free element. Strontium is softer than calcium and decomposes water more vigorously. Freshly cut strontium has a silvery appearance, but rapidly turns a yellowish colour with the formation of the oxide. The finely divided metal ignites spontaneously in air. Volatile strontium salts impart an excellent crimson colour to flames, and these salts are used in pyrotechnics.

The picture shows the colour arising from adding strontium sulphate salt to a burning mixture of potassium chlorate and sucrose.

The picture above shows the colour arising from adding strontium sulphate salt (SrSO4) to a burning mixture of potassium chlorate and sucrose. Do not attempt this reaction unless are a professionally qualified chemist and you have carried out a legally satisfactory hazard assessment.

Strontium-90 (90Sr) has a half-life of 28 years. It is a product of nuclear fallout and presents a major health problem. Strontium titanate is an interesting optical material as it has an extremely high refractive index and an optical dispersion greater than that of diamond. It has been used as a gemstone, but it is very soft.

strontium
This sample is from The Elements Collection, an attractive and safely packaged collection of the 92 naturally occurring elements that is available for sale.

Strontium: physical properties

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Strontium: heat properties

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Strontium: atom sizes

More atomc size properties...

Strontium: electronegativities

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Strontium: orbital properties

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Strontium: abundances

More geological data...

Strontium: crystal structure

Sr crystal structure
The solid state structure of strontium is: bcc (body-centred cubic).

More crystallographic data...

Strontium: biological data

Strontium has no biological role.

More biological data...

Strontium: uses

Uses...

Strontium: reactions

Reactions of strontium as the element with air, water, halogens, acids, and bases where known.

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Strontium: binary compounds

Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of strontium where known.

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Strontium: compound properties

Bond strengths; lattice energies of strontium halides, hydrides, oxides (where known); and reduction potentials where known.

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Strontium: history

Strontium was discovered by Adair Crawford in 1790 at Scotland. Origin of name: named after the village of "Strontian" in Scotland.

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Strontium: isotopes

Isotope abundances of strontium
Isotope abundances of strontium with the most intense signal set to 100%.

Strontium has four stable isotopes and two of them have medical applications. Sr-86 is used for the production of the PET isotope Y-86 which is used in dosimetry prior to Y-90 based radioimmunotherapy. Sr-88 is used for the production of Sr-89 which is the active agent in MetastronTM.

More isotope and NMR data...

Strontium: isolation

Isolation: strontium metal is available commercially and there is no need to make it in the laboratory. Commercially it is made on small scale by the electrolysis of molten strontium chloride, SrCl2.

cathode: Sr2+(l) + 2e- → Sr

anode: Cl-(l) → 1/2Cl2 (g) + e-

Strontium metal can also be islated from the reduction of strontium oxide, SrO, with aluminium.

6SrO + 2Al → 3Sr + Sr3Al2O6