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Element 38 - Strontium (Sr) sound

From Strontian, Scotland; discovered 1790; a rare metal which can take the place of calcium in bone tissue. If enough is absorbed, it destroys marrow and can cause cancer. Radioactive strontium 90 is present in atomic fall-out.

Properties

Atomic Number: 38
Atomic Weight: 87.62
Electron Configuration (at ground state): 1s22s22p63s23p63d104s24p65s2
Oxidation States (Bold most stable): +2
Boiling Point (K): 1655
Melting Point (K): 1042
Density (at 300K -- g/cm3): 2.54
Atomic Volume (at 300K -- cm3/mol) 33.7
Number of stable isotopes: 4
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: 90 -- 28.8 years -- beta particle (electron) emission
Covalent Radius (Å): 1.91
Atomic Radius (Å): 1.97
First Ionization Potential (V): 5.695
Electronegativity (Pauling's): 0.95
Specific Heat Capacity (at 300K -- J g-1 K-1): 0.30
Heat of Vaporization (kJ/mol): 136.9
Heat of Fusion (kJ/mol): 8.2
Electrical Conductivity (at 293K for polycrystalline material -- 106 (ohms)-1 cm-1): 5.0
Thermal Conductivity (at 300K -- W m-1 K-1): 35.3
Crystal Structure: Cubic, face centered
Acid-Base Properties: Very basic