Calcium
Calcium
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Calcium ΒΆ
AtomicNumber: 20
Element: Calcium
Symbol: Ca
AtomicMass: 40.078
NumberofNeutrons: 20
NumberofProtons: 20
NumberofElectrons: 20
Period: 4
Group: 2.0
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Alkaline Earth Metal
AtomicRadius: 2.2
Electronegativity: 1.0
FirstIonization: 6.1132
Density: 1.54
MeltingPoint: 1112.15
BoilingPoint: 1757.0
NumberOfIsotopes: 14.0
Discoverer: Davy
Year: 1808.0
SpecificHeat: 0.647
NumberofShells: 4
NumberofValence: 2.0