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Rhenium is one of the rarest elements with the third-highest melting point.
Physical Properties
| পদাৰ্থ | 186.21 u |
| ঘনত্ব | 21.02 g/cm³ |
| Melting Point | 3459.0 K |
| উত্তাপৰ বিন্দু | 5869.0 K |
| আকৃতি | Silvery-grayish metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 1.9 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 760.0 kJ/mol |
| ইলেকট্ৰন | 5.8 kJ/mol |
| Oxidation States | +1, +2, +3, +4, +5, +6, +7 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Xe] 4f14 5d5 6s2 |
| পৰমাণু | 137.0 pm |
| কোভালেন্ট বেৰিয়াড | 151.0 pm |
| Van der Waals Radius | 217.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Masataka Ogawa, Walter Noddack, Ida Tacke, Otto Berg |
| আবিষ্কাৰৰ বছৰ | 1925 |
| অৱস্থান | Germany |
| Named After | Latin 'Rhenus' meaning the Rhine River |
বিষয়ে Rhenium
Rhenium is a silvery-gray, heavy metal with the third-highest melting point. It was the last stable element to be discovered. The world's annual production is only about 50 tonnes.
Uses & Applications
Jet engine superalloys, petroleum refining catalysts, thermocouples, and mass spectrometer filaments.
মজা কথা
Rhenium was the last naturally occurring stable element discovered (1925) and only about 50 tonnes are produced per year worldwide.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 185 | 0.374% | - | Yes |
| 187 | 0.626% | 4.12e10 years | No |
ইলেকট্ৰন
[Xe] 4f14 5d5 6s2