Roentgenium (Rg) — Unknown. Atomic number 111.
Synthetic radioactive metal
- Atomic number: 111
- Symbol: Rg
- Atomic mass: [282] u
- Category: Unknown
- State: Solid
- Electron configuration: [Rn] 5f14 6d10 7s1
- Oxidation states: +1, +3
- Discovered by: Gesellschaft für Schwerionenforschung (1994)
Common uses: Scientific research only
Biological role: No biological role.
Frequently Asked Questions about Roentgenium
What is the atomic number of roentgenium?
Roentgenium has an atomic number of 111, meaning each atom contains 111 protons in its nucleus.
What is the atomic mass of roentgenium?
The standard atomic weight of roentgenium is [282] u (unified atomic mass units).
What category does roentgenium belong to?
Roentgenium is classified as a unknown.
What is the state of roentgenium at room temperature?
Roentgenium is a solid at 20 °C (68 °F).
What is the electron configuration of roentgenium?
The electron configuration of roentgenium is [Rn] 5f14 6d10 7s1.
What are the common oxidation states of roentgenium?
Roentgenium commonly exhibits the following oxidation states: +1, +3.
When was roentgenium discovered?
Roentgenium was discovered in 1994 by Gesellschaft für Schwerionenforschung.
Is roentgenium radioactive?
Roentgenium is a synthetic radioactive element that does not occur naturally and must be produced in a laboratory.
What is the biological role of roentgenium?
No biological role.
What are the common uses of roentgenium?
Roentgenium is used for: Scientific research only.
