Sr
Strontium is known for producing bright red colors in fireworks and flares.
Physical Properties
| পদাৰ্থ | 87.62 u |
| ঘনত্ব | 2.64 g/cm³ |
| Melting Point | 1050.0 K |
| উত্তাপৰ বিন্দু | 1655.0 K |
| আকৃতি | Silvery-white yellowish metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 0.95 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 549.5 kJ/mol |
| ইলেকট্ৰন | 5.03 kJ/mol |
| Oxidation States | +1, +2 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Kr] 5s2 |
| পৰমাণু | 215.0 pm |
| কোভালেন্ট বেৰিয়াড | 195.0 pm |
| Van der Waals Radius | 249.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Adair Crawford |
| আবিষ্কাৰৰ বছৰ | 1790 |
| অৱস্থান | Edinburgh, Scotland |
| Named After | Strontian, a village in Scotland |
বিষয়ে 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.
Uses & Applications
Fireworks and flares (red color), ferrite magnets, CRT glass, toothpaste for sensitive teeth, and bone cancer treatment.
মজা কথা
Strontium-90 is one of the most dangerous nuclear fallout components because it mimics calcium and is absorbed into bones.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 84 | 0.0056% | - | Yes |
| 86 | 0.0986% | - | Yes |
| 87 | 0.07% | - | Yes |
| 88 | 0.8258% | - | Yes |
ইলেকট্ৰন
[Kr] 5s2