Atomic number: 20
Year discovered: 1808
Discovered by: Sir Humphry Davy (1778-1829), an English chemist.
- Compounds such as lime (calcium oxide) were prepared by the Romans in the first century under the name calx.
- Literature dating back to about 975 A.D. notes that plaster of Paris (calcium sulphate, dehydrated gypsum) was useful for setting broken bones.
- Other calcium compounds used in early times include limestone (calcium carbonate).
- Calcium metal was not isolated until 1808.
- After learning that Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, Sir Humphry Davy was able to isolate the impure metal.
- He did this by the electrolysis of a mixture of lime and mercuric oxide.
- Calcium metal was not available in large amounts until the beginning of the 20th century.
Name in other languages:
Information about other elements may be seen at this Chemical Elements List.
A special unit about words that include chemo-, chem- may be seen here.