Show Elements
ID 13
Symbol Ca
Name Calcium
Density (g/cm<sup>3</sup>) 1.55
Atomic Number 20
Molecular Weight 40
Melting Point (K) 1115
Boiling Point (K) 1757
Specific Heat Capacity (J/kg K) 631
Electro Negativity 1
Curie temperature (K)
Bohr Magneton (J/T)
Magnetization Saturation (MA m<sup>-1</sup>)
Crystal Structure ​Face-centred cubic (fcc)
Appearance Dull gray, silver
Element category Alkaline earth metal
Magnetic ordering Paramagnetic
Discovery In The United Kingdom (1808)
General Information Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium.
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