Rn
Radon
Element 86 · 222.01758 u
NumerasieCity name (optional, probably does not need a translation)
p-block
Periode 6
Group 18
Gas by RT
Radioaktief
t½ 3.8235 days
Dag lengte: →
Radon is a radioactive noble gas and the second leading cause of lung cancer after smoking.
Fisiese eienskappe
| Atomic Mass | 222.01758 u |
| Density | 0.00973 g/cm³ |
| Smelt punt: | 202.0 K |
| Boiling Point | 211.3 K |
| Appearance | Colorless gas |
| Toestand by kamerkomp | Gas |
Chemical Properties
| Electronegativity | 2.2 (TrinidadCity name (optional, probably does not need a translation)) |
| 1st Ionization Energy | 1037.0 kJ/mol |
| Electron Affinity | -68.0 kJ/mol |
| Oxidation States | +2, +6 |
Atomic Properties
| Electron Configuration | [Xe] 4f14 5d10 6s2 6p6 |
| Atomic Radius | 150.0 pm |
| Covalent Radius | 150.0 pm |
| Atomic radius: | 220.0 pm |
Discovery
| Discovered By | Friedrich Ernst Dorn |
| Discovery Year | 1900 |
| Location | Halle, Germany |
| Genoemde Na | Named after radium, from which it is produced |
About 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.
Gebruiks & Programme
Radon testing in buildings, earthquake prediction research, and hydrological research.
Fun Fact
Radon is the second leading cause of lung cancer after smoking, yet it is odorless and invisible. The EPA recommends testing all homes.
Isotopes
| Definieer Molekulêr Gewigte | Abundance | Half-Life | Stabiel |
| 211 | - | 14.6 hours | Nee |
| 220 | - | 55.6 seconds | Nee |
| 222 | - | 3.8235 days | Nee |
Electron Configuration
[Xe] 4f14 5d10 6s2 6p6