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Atomic mass, symbol and atomic number
radon is a naturally occurring element with the element symbol Rn and atomic number 86. In the periodic table it stands with an atomic mass of 222 u in the 8th main group. The chemical element discovered by Friedrich Ernst Dorn in 1900 is radioactive and is in a gaseous state at room temperature.
Profile: Radon (English Radon)
| General | |
|---|---|
| Chemical element: | radon |
| Symbol: | rn |
| Atomic number: | 86 |
| Group: | Noble gas group |
| Period: | 6 |
| Block: | p-block |
| Series: | noble gases |
| Appearance: | colorless |
| explorers: | Friedrich Ernst Dorn |
| Year of discovery: | 1900 |
| Atomic properties | |
| Atomic mass: | 222 u |
| Atomic radius: | ??? |
| Covalent radius: | 150 pm |
| Van der Waals radius: | 220 pm |
| Electron configuration: | Xe 4f14 5d10 6s2 6p6 |
| ionization: | 1037 kJ / mol |
| Physical Properties | |
| Physical state: | gaseous |
| Density: | ??? |
| Crystal structure: | cubic |
| Magnetism: | diamagnetic |
| molar volume: | 50,50 · 10-6 m3/ mol |
| Mohs hardness: | / |
| Melting point: | -71 ° C |
| Boiling point: | -61 ° C |
| Heat of fusion: | 2.89 kJ / mol |
| Heat of vaporization: | 16.4 kJ / mol |
| Thermal conductivity: | 0.003 W |
| Chemical properties | |
| electronegativity: | 2,2 |
Did you know that ...
- Radon is the rarest element of the noble gas group?
- can the name of the element be derived from the radioactive property (lat. radius)?
- Radon in the group of noble gases is the only radioactive element?
- Radon as an intermediate in the decay series of 238Uranium is produced?
