Strontium
(Redirected from Sr)
| Strontium | |
|---|---|
| Sr | |
| In situ availability: | |
| Necessity: | |
| Atomic number: | 38 |
| Atomic mass: | 87.62 |
| group: | 2 |
| period: | 5 |
| normal phase: | Solid |
| series: | Alkaline earth metals |
| density: | 2.64 g/cm3 |
| melting point: | 1050K, 777°C, 1431°F |
| boiling point: | 1655K, 1382°C, 2520°F |
| K ← Ca → Sc | |
| Rb ← Sr → Y | |
| Cs ← Ba → La | |
| Atomic radius (pm): | 200 |
| Bohr radius (pm): | 219 |
| Covalent radius (pm): | 192 |
| Van der Waals radius (pm): | |
| ionic radius (pm): | (+2) 126 |
| 1st ion potential (eV): | 5.70 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 | |
| Electrons Per Shell | |
| 2, 8, 18, 8, 2 | |
| Electronegativity: | 0.95 |
| Electron Affinity: | 0.11 |
| Oxidation states: | 2 |
| Magnetism: | Paramagnetic |
| Crystal structure: | Face centered cubic |
Strontium is a Alkaline earth metal in group 2.
It has a Face centered cubic crystalline structure.
This element has 4 stable isotopes: 84, 86, 87, and 88.
Strontium is indistinguishable from Calcium to cells, and radioactive strontium 90 is often found in bones of humans and other animals after nuclear detonations.
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