Strontium (Sr) — Alkaline earth metal. Atomic number 38.
Silvery alkaline earth metal
- Atomic number: 38
- Symbol: Sr
- Atomic mass: 87.62 u
- Category: Alkaline earth metal
- State: Solid
- Melting point: 776.85 °C / 1050 K
- Boiling point: 1381.85 °C / 1655 K
- Density: 2.64 g/cm³ (20°C)
- Electron configuration: [Kr] 5s2
- Oxidation states: +2
- Electronegativity: 0.95
- Discovered by: Adair Crawford (1790)
Common uses: Fireworks, Ceramics, Magnets, Medical imaging
Biological role: Not essential, but can substitute for calcium in bone.
Frequently Asked Questions about Strontium
What is the atomic number of strontium?
Strontium has an atomic number of 38, meaning each atom contains 38 protons in its nucleus.
What is the atomic mass of strontium?
The standard atomic weight of strontium is 87.62 u (unified atomic mass units).
What category does strontium belong to?
Strontium is classified as a alkaline earth metal.
What is the state of strontium at room temperature?
Strontium is a solid at 20 °C (68 °F).
What is the melting point of strontium?
The melting point of strontium is 776.85 °C / 1050 K.
What is the boiling point of strontium?
The boiling point of strontium is 1381.85 °C / 1655 K.
What is the density of strontium?
The density of strontium is 2.64 g/cm³ (20°C).
What is the electronegativity of strontium?
Strontium has a Pauling electronegativity of 0.95.
What is the electron configuration of strontium?
The electron configuration of strontium is [Kr] 5s2.
What are the common oxidation states of strontium?
Strontium commonly exhibits the following oxidation states: +2.
When was strontium discovered?
Strontium was discovered in 1790 by Adair Crawford.
Is strontium radioactive?
Strontium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of strontium?
Not essential, but can substitute for calcium in bone.
What are the common uses of strontium?
Strontium is used for: Fireworks; Ceramics; Magnets; Medical imaging.
