Noun
A metallic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3.
A radioactive isotope of strontium produced by certain nuclear reactions, and constituting one of the prominent harmful components of radioactive fallout from nuclear explosions; also called radiostrontium. It has a half-life of 28 years.
Source: Webster's dictionaryIt is kept under a liquid hydrocarbon such as mineral oil or kerosene to prevent oxidation ; freshly exposed strontium metal rapidly turns a yellowish color with the formation of the oxide. Source: Internet
Because the elements are chemically similar, the stable strontium isotopes might not pose a significant health threat — in fact, the levels found naturally may actually be beneficial (see below). Source: Internet
Brighter atoms are strontium and darker ones are titanium. Source: Internet
From strontium onward, the alkali earth metals become denser with increasing atomic mass. Source: Internet
Half the increase in bone density (measured by X-ray densitometry) is discounted because strontium has greater atomic density than calcium, while the other half is a true increase in bone mass. Source: Internet
In 10 half-lives (or about 500 days) 99.9% of the radioactive strontium will decay. Source: Internet