Sr
Strontium Symbol (Sr)
Strontium is element 38 of the periodic table. Copy its symbol Sr and see its atomic weight, electron configuration and common compounds.
What does Sr mean?
Sr is the chemical symbol for strontium, element number 38 in the periodic table. Strontium is an alkaline earth metal in group 2, period 5. It is an alkaline earth metal whose salts give fireworks their red colour.
Codes and properties
| Chemical symbol | Sr |
|---|---|
| Atomic number (Z) | 38 |
| Atomic weight (PubChem) | 87.62 |
| Group / period | 2 / 5 |
| Element category | alkaline earth metal |
| Electron configuration | [Kr]5s² |
| State at 20 °C | Solid |
| Oxidation states | +2 |
| Electronegativity (Pauling) | 0.95 |
| Melting point | 1050 K (776.85 °C) |
| Boiling point | 1655 K (1381.85 °C) |
| Density | 2.64 g/cm³ |
| Discovered | 1790 |
| Common compounds | SrCO₃, Sr(NO₃)₂ |
How to type Sr
- Plain text: type
Sr— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as SrCO₃ — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Sr}in math mode, or use the mhchem package:\ce{Sr}. - HTML:
Sr; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for strontium?
The chemical symbol for strontium is Sr.
What is the atomic number of strontium?
Strontium has atomic number 38, meaning each atom has 38 protons.
What is the electron configuration of strontium?
The ground-state electron configuration of strontium is [Kr]5s².
Related symbols
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Reference: Strontium on PubChem (NIH)