Roentgenium (Rg)
Roentgenium (Rg, element 111) is a transition metal in group 11, period 7. Atomic mass 282, electron configuration [Rn] 5f¹⁴ 6d¹⁰ 7s¹, uses and facts.
About Roentgenium
Roentgenium is a transition metal with the symbol Rg and atomic number 111. Its state at room temperature is not known, because too little of it has been made, and it sits in group 11, period 7 of the periodic table. Roentgenium was discovered in 1994 by GSI Helmholtz Centre.
Roentgenium key facts
- Atomic number: 111
- Symbol: Rg
- Atomic mass: 282 u
- Category: transition metal
- Group: 11
- Period: 7
- State at room temperature: not known
- Electron configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s¹
- Electronegativity (Pauling): not assigned
- Melting point: not known
- Boiling point: not known
- Density: not known
- Common oxidation states: not known
Electron configuration
The electron configuration of roentgenium is [Rn] 5f¹⁴ 6d¹⁰ 7s¹. The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of roentgenium
- Research only
Did you know?
Named after Wilhelm Röntgen, discoverer of X-rays. Has been produced only a few times.
Other elements in group 11 and neighbours
Frequently asked questions
What is the atomic number of roentgenium?
The atomic number of roentgenium is 111, which means every roentgenium atom has 111 protons.
What is the electron configuration of roentgenium?
The electron configuration of roentgenium is [Rn] 5f¹⁴ 6d¹⁰ 7s¹.
What group and period is roentgenium in?
Roentgenium is a transition metal in group 11, period 7.
What state is roentgenium at room temperature?
The state of roentgenium at room temperature is not known, because too little of it has been made.
What is roentgenium used for?
Roentgenium is used for research only.