CALCIUM

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When the word calcium is said usually the first thing that comes to mind is not a chemical, but milk or vitamins. Calcium is in fact an important chemical that benefits use in many ways. But how was it first discovered? Who discovered it? What does it do?


A scientist discovered calcium in 1808 by the name of Sir Humphrey Davy. Sir Humphrey Davy discovered calcium by isolating it with electrolysis of a mixture of lime and mercuric oxide (HgO). The Romans prepared compounds such as lime in the first century under the name calx. This is where the name for calcium derived from. Since it came from the Latin word calx, which means lime.


Calcium is a metallic element that is derived from the earth’s crust, of which it forms more than three percent. It is the bases for such items as leaves, bones, teeth, and of course shells. It is one of the alkaline earth elements; Calcium forms a white coating nitride in air, reacts with water, and burns with a yellow-red flame, forming largely the nitride.


Calcium is distinguishable by its metal silvery color and that it is rather hard as well. Limestone, gypsum and fluorite are some things that calcium is usually found in. The melting point for Calcium is 8 °C and it’s boiling point is at 1484 °C. It has a density of 1.55 g/cm³ and an atomic radius of . Å.


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Some uses of calcium are that it is essential for human nutrition and that animals’ skeletons get their rigidity primarily from calcium phosphate. Eggs of birds and shells of mollusks are also comprised of calcium carbonate. Calcium, like for humans, is essential for plants it also is used in making lime, bricks, cement, glass, paint, paper, sugar, glazes, as well as for many other uses.


Calcium is an important piece of our periodic table. Event though it is only two letters (Ca) on the table it has a meaning farther then that of which is there. It is essential for life and for plants and with out calcium the human race would need to find another source that could help repair and strengthen our bones. Fortunately if it wasn’t for Sir Humphrey Davy we wouldn’t be able to take our vitamins and see that it is composed of calcium. Women also need calcium for not only themselves but for their children as well. The importance of calcium reaches out farther then in this paper, it is just a necessity.





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