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Calcium is a soft alkaline earth metal known since ancient Roman times but not isolated until 1808 by Sir Humphry Davy.


Name Calcium
Atomic Number 20
Atomic Weight
Symbol Ca
Melting Point ( °C )
Boiling Point ( °C )
Density (g/cm3)
Earth crust (%)
Discovery (Year)
Group
Electron configuration
Ionization energy (eV)
 

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The Chemistry Book is a social networking site for chemistry learners and enthusiasts. The site began as a wiki written for high school students located in California. There are over 550 articles, budding glossary, tutoring area, and course calendars.