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Strontium (Sr)
Element with atomic number 38, category: Alkaline earth metal, a solid at room temperature.
Element 38 of 118
Alkaline earth metal
Strontium
Group 2, Period 5
Common Uses
Red fireworks
Electron Diagram
About Strontium
Strontium is a chemical element with the symbol Sr and atomic number 38, meaning every atom has 38 protons in its nucleus. It is classed as Alkaline earth metal and is a solid at room temperature. Its atomic mass is about 87.62 atomic mass units (u).
On the periodic table, Strontium sits in group 2, period 5, which determines how many electron shells it has and how it tends to react with other elements.
Uses of Strontium
In daily life and industry, Strontium is used for Red fireworks. These uses are closely tied to the typical properties of elements in the Alkaline earth metal category.
Electron Structure of Strontium
Using a simplified electron shell model (at most 2 electrons in the first shell, 8 in the second, 18 in the third, and so on), Strontium has 4 electron shells, with an approximate arrangement of 2, 8, 18, 10 electrons from the innermost shell to the outermost. This is a simplified learning model, not the full electron configuration that accounts for the s, p, d and f subshells.
Explore Other Elements
Want to see another element or try the element symbol quiz? Go back to the Interactive Periodic Table to explore all 118 chemical elements.