Strontium

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Strontium
87.62(1)



  Sr
38
1s22s22p63s23p63d104s2 4p65s2
[ ? ] Alkaline Earth Metal:
Properties:
Soft, silvery-gray metal. Highly reactive.


Strontium is a chemical element, having the chemical symbol Sr. Its atomic number (the number of protons) is 38. It has a standard atomic weight of 87.62 g•mol −1 and is a solid in its elemental form.

Strontium is considered to be a member of the "Alkaline earth metal" class of element. At a pressure of 101.325 kPa, it has a boiling point of 1,382 °C and a melting point of 777 °C.