RADON, Rn (86)

Radon is a radioactive, colourless, odourless and tasteless noble gas, occurring naturally as a decay product of radium. Being one of the densest substances that remains a gas under normal conditions. It is also the only gas under normal conditions that only has radioactive isotopes and is considered a health hazard due to its radioactivity.

ELEMENT BRIEF

1898 by Friedrich Ernst Dorn, Germany.

DISCOVERY

From the name Radium, the element.

ETYMOLOGY

Radon

ELEMENT

Rn

SYMBOL

86

ATOMIC NUMBER

10043-92-2

CAS NUMBER

ELEMENTAL SPECTRUM

Colourless

ELEMENTAL COLOUR

-

REFRACTIVE INDEX

-

POISSON RATIO

22.371 cm³

MOLAR VOLUME

-

BRINELL HARDNESS

-

MOHS HARDNESS

-

VICKERS HARDNESS

-

SPEED OF SOUND

-

BULK MODULUS

-

SHEAR MODULUS

-

YOUNG MODULUS

ALLOTROPES

NONE

202.15 K, -71.00 °C

MELTING POINT

211.45 K, -61.70 °C

BOILING POINT

-

AUTOMATIC IGNITION

-

FLASHPOINT

377.00 K, 103.85 °C

CRITICAL TEMPERATURE

6.28M Pa, 62 Atm

CRITICAL PRESSURE

0.003'610 W/(m K)

THERMAL CONDUCTIVITY

-

THERMAL EXPANSION

93.65 J/(kg K)

SPECIFIC HEAT

3.000 kJ/mol

HEAT FUSION

17.000 kJ/mol

HEAT VAPORISATION

-

HEAT COMBUSTION

-

CURIE POINT

-

NEEL POINT

5/3

ADIABATIC INDEX

Gas

PHASE

Conductor

ELECTRICAL TYPE

-

CONDUCTIVITY

-

RESISTIVITY

-

SUPERCONDUCTING POINT

-

MAGNETIC TYPE

-

MASS SUSCEPTIBILITY

-

MOLAR SUSCEPTIBILITY

-

VOLUME SUSCEPTIBILITY

Nobel Gas

CLASSIFICATION

217.673'191'1

ATOMIC WEIGHT

-

ATOMIC RADIUS

142 pm

COVALENT RADIUS SINGLE BOND

145 pm

COVALENT RADIUS DOUBLE BOND

133 pm

COVALENT RADIUS TRIPLE BOND

220 pm

VAN DER WAALS RADIUS

[Xe]6s²4f¹⁴5d¹⁰6p⁶

ELECTRON CONFIGURATION

Cubic, Face-centred

CRYSTAL STRUCTURE

-

DENSITY AS SOLID

-

DENSITY AS LIQUID

9.730'00 g/cm³

DENSITY AS GAS

-

SPACE GROUP NAME

-

SPACE GROUP NUMBER

-

LATTICE ANGLES

-

LATTICE CONSTANTS

6

VALENCE

-

ELECTRONEGATIVITY

-67.54 kJ/mol

ELECTRON AFFINITY

IONISATION ENERGY