Atomic Number of Radon

Radon Atomic Number

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 Year

About 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 SymbolRn
Group18
Period6
Atomic Weight222 u
Density0.00973 g/cm3
Melting Point (K)202 K
Melting Point (℃)-71 °C
Boiling Point (K)211.3 K
Boiling Point (℃)-61,8 °C
Heat Capacity0.094 J/g · K
Abundance4×10−13 mg/kg
State at STPGas
OccurrenceTransient
DescriptionNoble gas
Electronegativity (Pauling) χno data
Ionization Energy (eV)10.7485
Atomic Radius120pm
Covalent Radius145pm
Valence Electrons8
Year of Discovery1900
DiscovererDorn

What is the Boiling Point of Radon?

Radon boiling point is -61,8 °C. Boiling point of Radon in Kelvin is 211.3 K.

What is the Melting Point of Radon?

Radon melting point is -71 °C. Melting point of Radon in Kelvin is 202 K.

How Abundant is Radon?

Abundant value of Radon is 4×10−13 mg/kg.

What is the State of Radon at Standard Temperature and Pressure (STP)?

State of Radon is Gas at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Radon Discovered?

Radon was discovered in 1900.


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