Periodic Table of Elements: Strontium

Strontium is the chemical element with the symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly chemically reactive. The metal forms a dark oxide layer when it is exposed to air. Wikipedia Symbol: Sr Atomic number: 38 Electron configuration: [Kr] 5s2 Atomic mass: 87.62 u Melting point: 1,431°F (777°C) Discovered: 1790 by Adair Crawford Chemical series: Metal, Alkaline earth metal, Period 5 element

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