- Atomic Radius (Å)
Strontium is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air.
38
Atomic Number
87.62 u
Atomic Mass
1042.15 K
Melting Point
1655 K
Boiling Point
2.64 g/cm³
Density
2.5 Å
Atomic Radius
1.95 Å
Covalent Radius
0.95
Electronegativity
5.69 eV
First Ionization Energy
5.02
Electron Affinity
5
Number of Shells
2
Electron Valency
2, 8, 18, 8, 2
Electron Shell Occupations
0.3 J/g
Specific Heat