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The Element Roentgenium

Wilhelm Roentgen

"Wilhelm Roentgen"

Definition of the Roentgenium Element - former temporary name: unununium
Roentgenium is a chemical element in the periodic table that has the symbol Rg (formerly temporarily Uuu) and atomic number 111. It has an atomic weight of 272 making it one of the super-heavy atoms. It is a synthetic element whose only known isotope has a half-life of around 15 ms before it decays into meitnerium. Due to its presence in Group 11 it is a transition metal and so probably metallic and solid.

The Properties of the Roentgenium Element
Symbol of Element : Rg
Atomic Number: 111
Atomic Mass: [272] amu
Melting Point: N/A
Boiling Point: N/A
Number of Protons/Electrons: Unknown
Number of Neutrons : Unknown
Crystal Structure: Unknown
Density Unknown
Color of Roentgenium : Unknown

Origin / Meaning of the name Roentgenium
The name was given in honour of honour of Wilhelm Roentgen.

Periodic Table Group and Classification of the of the Roentgenium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Roentgenium is classified as a "Transition Metal" which are located in Groups 3 - 12 of the Periodic Table. Elements classified as Transition Metals are generally described as ductile, malleable, and able to conduct electricity and heat. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

Facts about the History and the Discovery of the Roentgenium Element
Roentgenium was discovered by S. Hofmann at the Gesellschaft für Schwerionenforschung in Darmstadt, Germany in 1994

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

Occurrence of the Roentgenium Element

Abundances of the element in different environments
% in Universe N/A
% in Sun None
% in Meteorites None
% in Earth's Crust None
% in Oceans None
% in Humans None

Associated Uses of Roentgenium
No known uses

Site Index
Transition Metals
List of Metals
Periodic Table

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