109
Mt
Meitnerium
Transition metal period 7 group 9 d-block discovered: 1982
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 109
- Atomic mass
- 277.154 a.m.u.
- Electron configuration
- [Rn]7s2 5f14 6d7 (calculated)
- Oxidation states
- 9, 8, 6, 4, 3, 1
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid