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38 - Strontium alkaline earth metal

Discovered by William Cruickshank in 1808

Strontium

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.
Shell Electrons Orbitals
1 2 2 in 1s
2 8 2 in 2s + 6 in 2p
3 18 2 in 3s + 6 in 3p + 10 in 3d
4 8 2 in 4s + 6 in 4p
5 2 2 in 5s
StrontiumSr Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2
87.62  u Atomic Mass
2.5  Å Atomic Radius
1655  K Boiling Point
1.95  Å Covalent Radius
2.64  g/cm³ Density
5.02 Electron Affinity
0.95 Electronegativity
5.69  eV First Ionization Energy
1042.15  K Melting Point
5 Number of Shells
2 Electron Valency
38 Atomic Number
2, 8, 18, 8, 2 Electron Shell Occupations
0.3  J/(g K) Specific Heat