Sr
Strontium
Element 38 · 87.62 u
Strontium is known for producing bright red colors in fireworks and flares.
Fisiese eienskappe
| Atomic Mass | 87.62 u |
| Density | 2.64 g/cm³ |
| Smelt punt: | 1050.0 K |
| Boiling Point | 1655.0 K |
| Appearance | Silvery-white yellowish metallic |
| Toestand by kamerkomp | Solied |
Chemical Properties
| Electronegativity | 0.95 (TrinidadCity name (optional, probably does not need a translation)) |
| 1st Ionization Energy | 549.5 kJ/mol |
| Electron Affinity | 5.03 kJ/mol |
| Oxidation States | +1, +2 |
Atomic Properties
| Electron Configuration | [Kr] 5s2 |
| Atomic Radius | 215.0 pm |
| Covalent Radius | 195.0 pm |
| Atomic radius: | 249.0 pm |
Discovery
| Discovered By | Adair Crawford |
| Discovery Year | 1790 |
| Location | Edinburgh, Scotland |
| Genoemde Na | Strontian, a village in Scotland |
About Strontium
Strontium is a soft, silvery-white metal that turns yellow in air. Its compounds burn crimson. The radioactive isotope strontium-90 is a dangerous component of nuclear fallout.
Gebruiks & Programme
Fireworks and flares (red color), ferrite magnets, CRT glass, toothpaste for sensitive teeth, and bone cancer treatment.
Fun Fact
Strontium-90 is one of the most dangerous nuclear fallout components because it mimics calcium and is absorbed into bones.
Isotopes
| Definieer Molekulêr Gewigte | Abundance | Half-Life | Stabiel |
| 84 | 0.0056% | - | Ja |
| 86 | 0.0986% | - | Ja |
| 87 | 0.07% | - | Ja |
| 88 | 0.8258% | - | Ja |
Electron Configuration
[Kr] 5s2