38 Sr
Alkaline earth metal
Strontium
Red color in fireworks.
Properties of Strontium
- Atomic number (Z)
- 38
- Symbol
- Sr
- Atomic mass
- 87.62 g/mol
- Category
- Alkaline earth metal
- Group
- 2
- Period
- 5
- Electron configuration
- [Kr] 5s²
- Electronegativity (Pauling)
- 0.95
- Atomic radius
- 219 pm
- First ionization energy
- 549 kJ/mol
- Melting point
- 1050 K (776.9 °C)
- Boiling point
- 1655 K (1381.8 °C)
- Density
- 2.64 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1790
Frequently asked questions
What is Strontium?
Strontium (Sr) is an alkaline earth metal, element number 38 on the periodic table. Red color in fireworks.
What is the atomic number and atomic mass of Strontium?
Strontium has atomic number 38 and an atomic mass of about 87.62 g/mol.
What is the electron configuration of Strontium?
The electron configuration of Strontium is [Kr] 5s².
Where is Strontium on the periodic table?
Strontium sits in group 2, period 5, and is classified as a alkaline earth metal.