Rn
Radon
উপাদান 86 · 222.01758 u
Radon is a radioactive noble gas and the second leading cause of lung cancer after smoking.
Physical Properties
| পদাৰ্থ | 222.01758 u |
| ঘনত্ব | 0.00973 g/cm³ |
| Melting Point | 202.0 K |
| উত্তাপৰ বিন্দু | 211.3 K |
| আকৃতি | Colorless gas |
| State at Room Temp | Gas |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 2.2 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 1037.0 kJ/mol |
| ইলেকট্ৰন | -68.0 kJ/mol |
| Oxidation States | +2, +6 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Xe] 4f14 5d10 6s2 6p6 |
| পৰমাণু | 150.0 pm |
| কোভালেন্ট বেৰিয়াড | 150.0 pm |
| Van der Waals Radius | 220.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Friedrich Ernst Dorn |
| আবিষ্কাৰৰ বছৰ | 1900 |
| অৱস্থান | Halle, Germany |
| Named After | Named after radium, from which it is produced |
বিষয়ে Radon
Radon is a colorless, odorless radioactive gas formed from radium decay. It is the densest gas known. Radon seeps from the ground and accumulates in basements, causing thousands of lung cancer deaths per year.
Uses & Applications
Radon testing in buildings, earthquake prediction research, and hydrological research.
মজা কথা
Radon is the second leading cause of lung cancer after smoking, yet it is odorless and invisible. The EPA recommends testing all homes.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 211 | - | 14.6 hours | No |
| 220 | - | 55.6 seconds | No |
| 222 | - | 3.8235 days | No |
ইলেকট্ৰন
[Xe] 4f14 5d10 6s2 6p6