38
Sr
Strontium
Alkaline earth metal period 5 group 2 s-block discovered: 1790
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 38
- Atomic mass
- 87.62 a.m.u.
- Electron configuration
- [Kr]5s2
- Electronegativity
- 0.95 on the Pauling scale
- Atomic radius
- 249 pm
- Ionization energy
- 5.695 eV
- Oxidation states
- +2
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1050 K (776,85 °C)
- Boiling point
- 1655 K (1 381,85 °C)
- Density
- 2.64 g/cm³