Element Roentgenium

Roentgenium ElementRoentgenium was first created in 1994 by the GSI Helmholtz Centre for Heavy Ion Research near Darmstadt, Germany. It is named after the physicist Wilhelm Röntgen (also spelled Roentgen), who discovered X-rays.
Roentgenium is a chemical element with the symbol Rg and atomic number 111
In the periodic table, it is a d-block transactinide element. It is a member of the 7th period and is placed in the group 11 elements, although no chemical experiments have been carried out to confirm that it behaves as the heavier homologue to gold in group 11 as the ninth member of the 6d series of transition metals.
Roentgenium is calculated to have similar properties to its lighter homologues, copper, silver, and gold, although it may show some differences from them.

Names and Identifiers

Chemical Formula:Rg
CAS:54386-24-2
Molecular Weight:282.169 g/mol
EC Number :n/a
MDL Number:n/a
Color:unknown (presumably metallic/ silvery white/ gray)
Other Names:Roentgenio
PubChem CID:135476786
IUPAC Name:Roentgenium
Inchl:InChI=1S/Rg
InChI Key:LJROPTGWFUZRDB-UHFFFAOYSA-N
Canonical SMILES:[Rg]
ICSC Number:n/a

Physical & Chemical Properties

Phase:Solid
Density:28.7 g/cm³
Boiling Point:n/a
Melting Point:n/a
Molecular Formula:Rg
Flash Point:n/a
Exact Mass:282

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
272Rg272.15350.0015 sα to 268Mt
279Rg2790.17 sα to 275Mt
280Rg2803.6 sα to 276Mt

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