Tm
Thulium is the rarest naturally occurring lanthanide.
Physical Properties
| পদাৰ্থ | 168.93 u |
| ঘনত্ব | 9.321 g/cm³ |
| Melting Point | 1818.0 K |
| উত্তাপৰ বিন্দু | 2223.0 K |
| আকৃতি | Silvery-gray metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 1.25 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 596.7 kJ/mol |
| ইলেকট্ৰন | 99.0 kJ/mol |
| Oxidation States | +2, +3 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Xe] 4f13 6s2 |
| পৰমাণু | 176.0 pm |
| কোভালেন্ট বেৰিয়াড | 190.0 pm |
| Van der Waals Radius | 227.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Per Teodor Cleve |
| আবিষ্কাৰৰ বছৰ | 1879 |
| অৱস্থান | Uppsala, Sweden |
| Named After | Thule, a mythical name for Scandinavia |
বিষয়ে Thulium
Thulium is a bright, silvery, lustrous metal and the least abundant naturally occurring lanthanide. Despite its rarity, thulium-170 is used as a portable X-ray source.
Uses & Applications
Portable X-ray devices, high-temperature superconductors, surgical lasers, and anti-counterfeiting.
মজা কথা
Thulium is the least abundant naturally occurring lanthanide, yet it finds use in portable X-ray machines for remote locations.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 169 | 1.0% | - | Yes |
ইলেকট্ৰন
[Xe] 4f13 6s2