Atomic NumberAtomic Number of Radon
Atomic Number of Radon is 86.
Chemical symbol for Radon is Rn. Number of protons in Radon is 86. Atomic weight of Radon is 222 u or g/mol. Melting point of Radon is -71 °C and its the boiling point is -61,8 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Radon
Radon is one of the noble gases known for their extremely low reactivity. Thus, it can be found in our planet in its pure form. It is odorless and has no color, but is highly radioactive. It was discovered in the very beginning of the 20th century and given the name after the word radiation. It is considered that radon has no importance for biological life on our planet, but as the evidence has shown it can play a role in evolution and genetic modifications, in particular. Generally, radon is used in nuclear chemistry and for treatment of certain types of cancers.
Properties of Radon Element
| Atomic Number (Z) | 86 |
|---|---|
| Atomic Symbol | Rn |
| Group | 18 |
| Period | 6 |
| Atomic Weight | 222 u |
| Density | 0.00973 g/cm3 |
| Melting Point (K) | 202 K |
| Melting Point (℃) | -71 °C |
| Boiling Point (K) | 211.3 K |
| Boiling Point (℃) | -61,8 °C |
| Heat Capacity | 0.094 J/g · K |
| Abundance | 4×10−13 mg/kg |
| State at STP | Gas |
| Occurrence | Transient |
| Description | Noble gas |
| Electronegativity (Pauling) χ | no data |
| Ionization Energy (eV) | 10.7485 |
| Atomic Radius | 120pm |
| Covalent Radius | 145pm |
| Valence Electrons | 8 |
| Year of Discovery | 1900 |
| Discoverer | Dorn |