Discovery of roentgenium

Roentgenium is a synthetic chemical element; it has symbol Rg and atomic number 111. It is extremely radioactive and can only be created in a laboratory.

Summary from Wikipedia (CC BY-SA 4.0) · Dates from Wikidata (CC0)

Which happened first?

• Discovery of roentgenium and Discovery of darmstadtium happened in the same year
• Discovery of roentgenium happened 2 years before Discovery of copernicium
• Discovery of roentgenium happened 5 years before Discovery of flerovium
• Discovery of roentgenium happened 6 years before Discovery of livermorium
• Discovery of roentgenium happened 8 years before Discovery of oganesson

Timeline

1. Discovery of darmstadtiumNovember 9, 1994
2. Discovery of roentgenium (this page)December 8, 1994
3. Discovery of copernicium1996
4. Discovery of fleroviumJanuary 1999
5. Discovery of livermoriumJuly 2000
6. Discovery of oganessonJune 2002

Related

• Discovery of hydrogen1766
• Discovery of oxygen1774
• Discovery of PlutoFebruary 18, 1930
• Discovery of carbon1789
• Discovery of aluminium1825
• Discovery of heliumAugust 18, 1868
• Discovery of nitrogen1772
• Discovery of sulfur1777