111
Rg
Roentgenium
Transition metal period 7 group 11 d-block discovered: 1994
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 111
- Atomic mass
- 282.169 a.m.u.
- Electron configuration
- [Rn]7s2 5f14 6d9 (predicted)
- Oxidation states
- 5, 3, 1, -1
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Expected to be solid