Strontium
Strontium
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Strontium ΒΆ
AtomicNumber: 38
Element: Strontium
Symbol: Sr
AtomicMass: 87.62
NumberofNeutrons: 50
NumberofProtons: 38
NumberofElectrons: 38
Period: 5
Group: 2.0
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Alkaline Earth Metal
AtomicRadius: 2.5
Electronegativity: 0.95
FirstIonization: 5.6949
Density: 2.64
MeltingPoint: 1042.15
BoilingPoint: 1655.0
NumberOfIsotopes: 18.0
Discoverer: Davy
Year: 1808.0
SpecificHeat: 0.301
NumberofShells: 5
NumberofValence: 2.0