Roentgenium (Rg)
"Meet Ghost Blink, the periodic table's ultimate speedster! They appear for a mere fraction of a second, leaving only a ghost of an impression before vanishing into thin air, making it almost impossible to pin them down."
A memorable persona to anchor Rg in your mind.
28.7
Grams per cm³
N/A
Celsius (°C)
N/A
Radius (pm)
Daily Life Link
Like a Snapchat message: gone almost the moment it appears!
Discovery & History
Year Discovered
1994
Discovered By
GSI Helmholtz Centre for Heavy Ion Research
Origin of Name
"The name roentgenium (Rg) was proposed by the GSI team in honour of the German physicist Wilhelm Conrad Röntgen, and was accepted as a permanent name on November 1, 2004"
Technical Properties
Atomic Mass
[280] u
Standard State
solid (expected)
Boiling Point
N/A
Electron Configuration
[Rn] 5f146d107s1
1st Ionization Energy
N/A
Electron Affinity
N/A
Oxidation States
"A fleeting metallic whisper, shimmering into existence only to vanish instantly."
Did You Know?
Super-Exclusive Club Member: Roentgenium (Rg) is Element 111, placing it way out in the superheavy division of the periodic table!
Man-Made Masterpiece: You won't find Roentgenium lying around in nature! Every single atom of this element has been painstakingly created in a lab.
The Ghost Element: Its longest-lived isotope, Roentgenium-282, has a blink-and-you'll-miss-it half-life of only about 100 seconds! Most isotopes vanish even faster.
Name-Drop Honor: It's named after Wilhelm Röntgen, the brilliant German physicist who discovered X-rays – talk about leaving a lasting legacy!