ROENTGENIUM, Rg (111)

Roentgenium is an extremely radioactive synthetic element. The most stable known isotope, roentgenium-281, has a half-life of 26 seconds and is calculated to have similar properties to its lighter homologues, copper, silver, and gold, although it may show some differences from them.

ELEMENT BRIEF

1994 by Workers at Gesellschaft für Schwerionenforschung, Germany.

DISCOVERY

From the name of Wilhelm Conrad Roentgen, discoverer of X-rays.

ETYMOLOGY

Roentgenium

ELEMENT

Rg

SYMBOL

111

ATOMIC NUMBER

54386-24-2

CAS NUMBER

ELEMENTAL SPECTRUM

-

ELEMENTAL COLOUR

-

REFRACTIVE INDEX

-

POISSON RATIO

9.762 cm³

MOLAR VOLUME

-

BRINELL HARDNESS

-

MOHS HARDNESS

-

VICKERS HARDNESS

-

SPEED OF SOUND

-

BULK MODULUS

-

SHEAR MODULUS

-

YOUNG MODULUS

ALLOTROPES

NONE

-

MELTING POINT

-

BOILING POINT

-

AUTOMATIC IGNITION

-

FLASHPOINT

-

CRITICAL TEMPERATURE

-

CRITICAL PRESSURE

-

THERMAL CONDUCTIVITY

-

THERMAL EXPANSION

-

SPECIFIC HEAT

-

HEAT FUSION

-

HEAT VAPORISATION

-

HEAT COMBUSTION

-

CURIE POINT

-

NEEL POINT

-

ADIABATIC INDEX

Solid

PHASE

-

ELECTRICAL TYPE

-

CONDUCTIVITY

-

RESISTIVITY

-

SUPERCONDUCTING POINT

-

MAGNETIC TYPE

-

MASS SUSCEPTIBILITY

-

MOLAR SUSCEPTIBILITY

-

VOLUME SUSCEPTIBILITY

Transition Metal

CLASSIFICATION

280.165'140'0

ATOMIC WEIGHT

-

ATOMIC RADIUS

121 pm

COVALENT RADIUS SINGLE BOND

116 pm

COVALENT RADIUS DOUBLE BOND

118 pm

COVALENT RADIUS TRIPLE BOND

-

VAN DER WAALS RADIUS

[Rn]7s²5f¹⁴6d¹⁰

ELECTRON CONFIGURATION

Cubic, Body-centred

CRYSTAL STRUCTURE

28.700'00 g/cm³

DENSITY AS SOLID

-

DENSITY AS LIQUID

-

DENSITY AS GAS

-

SPACE GROUP NAME

-

SPACE GROUP NUMBER

-

LATTICE ANGLES

-

LATTICE CONSTANTS

-

VALENCE

-

ELECTRONEGATIVITY

-

ELECTRON AFFINITY

IONISATION ENERGY