Pr
Praseodymium gives glass and enamel a distinctive yellow-green color.
Physical Properties
| পদাৰ্থ | 140.91 u |
| ঘনত্ব | 6.773 g/cm³ |
| Melting Point | 1208.0 K |
| উত্তাপৰ বিন্দু | 3793.0 K |
| আকৃতি | Grayish-white metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 1.13 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 527.0 kJ/mol |
| ইলেকট্ৰন | 93.0 kJ/mol |
| Oxidation States | +2, +3, +4 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Xe] 4f3 6s2 |
| পৰমাণু | 182.0 pm |
| কোভালেন্ট বেৰিয়াড | 203.0 pm |
| Van der Waals Radius | 239.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Carl Auer von Welsbach |
| আবিষ্কাৰৰ বছৰ | 1885 |
| অৱস্থান | Vienna, Austria |
| Named After | Greek 'prasios didymos' meaning green twin |
বিষয়ে Praseodymium
Praseodymium is a soft, silvery, malleable metal separated from neodymium in 1885 by Welsbach from what was thought to be 'didymium.'
Uses & Applications
Magnets (with neodymium), aircraft engines, welder's goggles, and ceramics colorant.
মজা কথা
Praseodymium was hidden for decades inside 'didymium' until it was finally separated from neodymium in 1885.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 141 | 1.0% | - | Yes |
ইলেকট্ৰন
[Xe] 4f3 6s2