38
Sr
Strontium
Strontium
Strontium (Sr)
Alkaline Earth Metals · Solid · Period 5 · Group 2
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Element Properties
- Atomic Number
- 38
- Symbol
- Sr
- Atomic Mass
- 87.62
- Category
- Alkaline Earth Metals
- Standard State
- Solid
- Period
- 5
- Group
- 2
- Electronegativity
- 0.95
- Atomic Radius
- 249
- Ionization Energy
- 5.7
- Electron Affinity
- —
- Oxidation States
- +2
- Melting Point
- 1050 K (776.85 °C)
- Boiling Point
- 1655 K (1381.85 °C)
- Density
- 2.64
- Electron Configuration
- [Kr]5s2
- Year Discovered
- 1790
Frequently asked questions
What is the atomic number of Strontium?
The atomic number of Strontium is 38, which equals the number of protons in its nucleus.
What is the atomic mass of Strontium?
The atomic mass of Strontium is approximately 87.62 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Strontium?
The electron configuration of Strontium is [Kr]5s2.
Where is Strontium in the periodic table?
Strontium is located in period 5, group 2.
When was Strontium discovered?
Strontium was discovered in 1790.
Related elements
Same group
4
Be
Beryllium
9.012
12
Mg
Magnesium
24.305
20
Ca
Calcium
40.08
56
Ba
Barium
137.33
88
Ra
Radium
226.025