38Sr87.62
Strontium
Alkaline earth metal · element 38 · group 2, period 5
Quick facts
| Symbol | Sr |
|---|---|
| Atomic number | 38 |
| Relative atomic mass | 87.62 |
| Category | Alkaline earth metal |
| Position | group 2, period 5 |
| State at 20 °C | Solid |
| Melting point | 777 °C |
| Boiling point | 1,377 °C |
| Density | 2.64 g/cm³ |
| Electronegativity | 0.95 |
| Electron configuration | [Kr] 5s2 |
About Strontium
Strontium has the symbol Sr and atomic number 38, which means every strontium atom has 38 protons in its nucleus and, in a neutral atom, 38 electrons. At room temperature it is a solid.
Alkaline earth metals are in group 2. They are reactive metals (less reactive than group 1) that form compounds with a 2+ charge.
It melts at 777 °C and boils at 1,377 °C.
Explore it
See where strontium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.