Strontium was discovered by an Irish chemist, Adair Crawford, in 1790. But it was not until 1808, that Strontium was first isolated by Sir Humphry Davy, an English chemist. Strontium was named after the village of Strontian in Scotland.
Atomic number: 38
Atomic weight: 87.62
Group, period, block: 2, 5, s
Color: silvery white metallic
Classification: alkaline earth metal
Electron configuration: 5s2
Density: 2.64 g/cm-3
Melting point: 1050 K,777 °C,1431 °F
Boiling point: 1655 K,1382 °C,2520 °F
Oxidation states: 2, 1,
Electronegativity: 0.95 (Pauling scale)
Ionization energies: 1st: 549.5 kJ·mol-1
Covalent radius: 195±10 pm
Van der Waals radius: 249 pm
There arefour naturally occurring isotopes of strontium exist, 84Sr, 86Sr, 87Sr, and 88Sr.