Roentgenium (Rg)

Roentgenium is named after Wilhelm Röntgen, the physicist who discovered X-rays.

Properties of Roentgenium

Atomic number

111

Category

Transition Metal

Atomic mass

282 u

Electron configuration

[Rn] 5f¹⁴ 6d⁹ 7s²

Density

28.7 g/cm³

Appearance

Unknown, presumably metallic

Discovered by

Peter Armbruster (1994)

Facts about Roentgenium

• Roentgenium is named after Wilhelm Röntgen, who discovered X-rays!
• Röntgen won the very first Nobel Prize in Physics in 1901!
• Roentgenium atoms last only about 100 seconds!
• Scientists predict roentgenium would look like gold if enough were made!

Roentgenium videos

• Nickel and bismuth nuclei spiralling together and fusing into roentgenium, radiating fine rays outward like the x-rays it is named for

Back to the periodic table · Roentgenium on Wikipedia